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Mint green shell stitch baby dress pattern

A top-down baby dress in double crochet (UK treble) shells, with US and UK stitch terms given throughout.

Mint green shell stitch baby dress pattern
Skill
Intermediate
Time
12-18 hours
Yarn weight
DK
Hook
7 mm

Intermediate

What the original write-up called it. Nothing here is graded again.

DK

What the sample was worked in. Any weight works; the size moves with it.

12-18 hours

What the original page reckoned. Your own pace is the one that matters.

About this pattern

This pattern produces a mint green baby dress worked top-down in joined rounds, moving from a raglan-shaped single crochet yoke into an open shell stitch (double crochet, UK treble) skirt. Rated intermediate, it suits crocheters comfortable joining rounds, following a repeat, and changing colour. The newborn to 3-month size takes roughly 12 to 18 hours; larger sizes run up to 22 hours.

This mint green dress for babies belongs to the shell stitch family, where clusters of five double crochets (UK treble crochet) fan out from a single base to create a scalloped, lacy skirt. The bodice is worked in plain single crochet, keeping the yoke dense and structured, while the skirt below opens into the airy shell repeat that gives the garment its movement and drape.

Construction begins at the neckline and moves downward in joined rounds, with raglan increases marked by four stitch markers separating the two sleeve sections from the front and back panels. After the underarm separation, a waistband and eyelet row set up a channel for ribbon before the fabric opens into the shell stitch skirt. Contrast-colour edgings finish the hem and sleeves, and a separately worked bow attaches at the back closure.

Materials

  • Yarn A (main color): approximately 200 (175 / 200 / 240) yards of DK weight yarn in mint green
  • Yarn B (contrast): approximately 65 (55 / 65 / 80) yards of DK weight yarn in pale yellow

Additional supplies

  • Tapestry needle for weaving in ends
  • 4 stitch markers
  • Scissors

Optional

  • three small buttons (approximately 7 mm) for back closure

Optional

  • 12 inches of quarter-inch ribbon in pale yellow for threading through waist

Yarn recommendations I love for this project

  • Paintbox Yarns Simply DK (100% acrylic, 276 yards per 100g skein) in Spearmint Green and Buttercup Yellow. Excellent stitch definition, machine washable, and easy to find.
  • Lion Brand Pound of Love (100% premium acrylic, 1020 yards per 454g) in Pastel Green and Pastel Yellow. Super economical if you’re making multiple gifts.
  • Scheepjes Catona (100% mercerized cotton, 62 yards per 25g ball) in Crystaltine and Lemon. Cotton gives a lovely drape and crispness to the shell pattern. Perfect for warmer climates.

Quick tip

  • For baby garments, always prioritize machine washable fibers. New parents will thank you. Avoid loosely plied yarns because they can make the shell pattern look mushy.

The list is the pattern's own wording.

Instructions

Every round is printed as the pattern wrote it, brackets and all. Open the key beside a round to see only the short forms that round uses.

Crocheted Bow

With Yarn B, chain 21.

Join Yarn B with slip stitch to any stitch of the original foundation chain (the neckline edge of Round 1).

Step by step: Working into the underside of the foundation chain:.

(Yarn B): Chain 1, single crochet in each chain around. Slip stitch to join. (60 sc for 3-6 months)

  1. Round 1

    Single crochet in 2nd chain from hook and in each chain across. Turn. (20 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  2. Round 2

    Chain 1, single crochet in each stitch across. Turn. (20 sc)Step by step: Fasten off Yarn B. Weave in all ends.

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  3. Round 3

    Chain 1, single crochet in each stitch across. Turn. (20 sc) Fasten off leaving a 12-inch tail. Pinch the rectangle at its center. Wrap the tail yarn around the pinch point 6 times tightly and secure with several knots to form the bow’s center knot. Use the remaining tail to sew the bow to the dress.

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.

Section 1: Neckline and Yoke

The yoke is worked in single crochet with raglan increases every other round. Eight increase stitches are added every increase round.

With Yarn A, chain 61 (55 / 61 / 67). Taking care not to twist, slip stitch to first chain to form ring.

  1. Round 1

    Foundation Chain 1, single crochet in each chain around, slip stitch to first single crochet to join. (60 / 54 / 60 / 66 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.

From this point, all sizing notes are given as (newborn / 3-6 months / 6-12 months). The main written instructions follow the 3-6 month size which has 60 stitches after Round 1.

  1. Round 2

    Marker placement Chain 1. Single crochet in first 8 stitches (left front section), place marker in next stitch, single crochet in next 2 stitches (raglan seam pair), place marker in next stitch, single crochet in next 14 stitches (sleeve), place marker in next stitch, single crochet in next 2 stitches, place marker in next stitch, single crochet in next 14 stitches (back), single crochet in next 8 stitches (right front), slip stitch to join. (60 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  2. Round 3

    (increase round 1): Chain 1. Single crochet in each stitch to 1 stitch before first marker, 2 single crochet in next stitch, slip marker to working loop, 2 single crochet in next stitch, single crochet to 1 stitch before next marker, 2 single crochet in next stitch, slip marker forward, 2 single crochet in next stitch, single crochet to 1 stitch before next marker, 2 single crochet in next stitch, slip marker forward, 2 single crochet in next stitch, single crochet to 1 stitch before next marker, 2 single crochet in next stitch, slip marker forward, 2 single crochet in next stitch, single crochet to end, slip stitch to join. (68 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  3. Round 4

    Plain round Chain 1, single crochet in each stitch around, slip stitch to join. (68 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  4. Round 5

    (increase round 2): Work same increase logic as Round 3. (76 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  5. Round 6

    Plain round Chain 1, single crochet in each stitch around, slip stitch to join. (76 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  6. Round 7

    (increase round 3): Work increases at all 4 marker pairs. (84 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  7. Round 8

    Plain round Chain 1, single crochet in each stitch around, slip stitch to join. (84 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  8. Round 9

    (increase round 4): Work increases at all 4 marker pairs. (92 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  9. Round 10

    Plain round Chain 1, single crochet in each stitch around, slip stitch to join. (92 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  10. Round 11

    (increase round 5): Work increases at all 4 marker pairs. (100 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  11. Round 12

    Plain round Chain 1, single crochet in each stitch around, slip stitch to join. (100 sc)Size notes: For newborn, stop after Round 10 (92 sc). For 3-6 months, stop after Round 12 (100 sc). For 6-12 months, work two additional increase rounds alternated with plain rounds for a total of 7 increase rounds (116 sc).

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.

Checkpoint: The yoke should measure approximately 3.5 inches (9 cm) from the neckline edge to the bottom.

Section 5: Hem Edging

Fasten off Yarn A. Join Yarn B with slip stitch to any single crochet between shells.

  1. Round 1

    of hem (Yarn B): Chain 1, single crochet in same stitch, 5 double crochet in center double crochet of next shell, single crochet in next chain-2 space (or single crochet), repeat around, slip stitch to first single crochet. (10 scallops)

  2. Round 2

    of hem (Yarn B): Chain 1, single crochet in same single crochet, 3 half double crochet in 2nd double crochet of shell, half double crochet in center double crochet, 3 half double crochet in 4th double crochet, single crochet in single crochet, repeat around, slip stitch.Fasten off Yarn B. Weave in ends on wrong side.

Section 6: Sleeve Edging

Place the 24 held sleeve stitches for one sleeve on your hook.

  1. Round 1

    Yarn A, optional Chain 1, single crochet in each stitch around, single crochet 2 into each of the 4 underarm bridge chain stitches to pick up evenly. Slip stitch to join. (28 sc)Fasten off Yarn A. Join Yarn B.

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  2. Round 2

    Yarn B scallop Chain 1, single crochet in first stitch, skip 1 stitch, 5 double crochet in next stitch, skip 1 stitch, single crochet in next stitch, repeat around. Slip stitch to join. (7 scallops)Fasten off Yarn B. Repeat for second sleeve.

Section 2: Underarm Separation

  1. Round 13

    Separation round Chain 1. Single crochet across 14 left front stitches, chain 4 (underarm bridge chain), skip the next 24 sleeve stitches (place these on a stitch holder or scrap yarn), single crochet across 24 back stitches, chain 4, skip next 24 right sleeve stitches (place on holder), single crochet across 14 right front stitches, slip stitch to first single crochet to join.

  2. Round 14

    Underarm join round Chain 1. Single crochet in each single crochet and each chain stitch around. At each bridge chain midpoint, work single crochet 2 together to blend the underarm curves. Slip stitch to join. (60 sc)For newborn: 52 sc. For 6-12 months: 72 sc. Adjust to the nearest multiple of 6 if needed.

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.

Important: Your stitch count MUST be divisible by 6 for the shell pattern. If it’s not, work one round of even single crochet and adjust by working single crochet 2 together or increases at even intervals.

Section 3: Waist Band and Eyelet Row

  1. (60)
    Round 15

    and 16: Chain 1, single crochet in each stitch around, slip stitch to join. (60 sc each)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  2. Round 17

    Yarn B eyelet round Fasten off Yarn A. Join Yarn B with slip stitch to any stitch. Chain 3 (counts as double crochet), skip 1 stitch, double crochet in next stitch, chain 1, skip 1 stitch, repeat (double crochet in next, chain 1, skip 1) around, slip stitch to top of beginning chain-3 to join. (30 dc, 30 ch-1 spaces = 60 total)

    Key2
    ch
    chain: Yarn over, pull through the loop on your hook. This creates the foundation and is used for turning and spacing.
    dc
    double crochet: Yarn over, insert hook, yarn over and pull up a loop (3 loops), yarn over and pull through 2 loops (2 loops remain), yarn over and pull through remaining 2 loops. This is your main skirt stitch.
  3. Round 18

    Yarn B mini scallop Chain 1, single crochet in first chain-1 space, 3 double crochet in next double crochet, single crochet in next chain-1 space, repeat around, slip stitch to join. Fasten off Yarn B. (60 contact points)

  4. Round 19

    Join Yarn A with slip stitch to any single crochet between mini scallops. Chain 1, single crochet in same stitch, single crochet in each of next 2 double crochet, single crochet in next single crochet, repeat around. (60 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.

Checkpoint: From neckline to bottom of waist band should measure approximately 5.5 inches (14 cm).

Section 4: Shell Stitch Skirt

  1. Round 20

    (transition to shell): Chain 1. Single crochet in first stitch, skip 2 stitches, 5 double crochet in next stitch, skip 2 stitches, repeat (single crochet in next stitch, skip 2 stitches, 5 double crochet in next stitch, skip 2 stitches) around, slip stitch to first single crochet. (10 sc + 10 shells)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  2. Round 21

    Chain 3 (counts as first double crochet), 2 double crochet in same stitch (half shell at beginning), single crochet in center double crochet of next shell, chain 2, single crochet in center double crochet of next shell, 5 double crochet in next single crochet (full shell), repeat (chain 2, single crochet in center double crochet of next shell, 5 double crochet in single crochet) 8 times, chain 2, single crochet in center double crochet of last shell, 2 double crochet in same stitch as chain-3 beginning, slip stitch to top of chain-3 to complete the beginning half shell. (10 shells, 10 sc, 10 ch-2 spaces)

    Key2
    ch
    chain: Yarn over, pull through the loop on your hook. This creates the foundation and is used for turning and spacing.
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  3. Round 22

    Chain 1, single crochet in same space, 5 double crochet in next single crochet, single crochet in next chain-2 space, repeat (5 double crochet in next single crochet, single crochet in next chain-2 space) around, slip stitch to first single crochet. (10 shells, 10 sc)

    Key1
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
  4. Round 23

    through 28: Continue alternating Round 21 and Round 22 patterns. For newborn: work Rounds 20 through 26 before increase.For 3-6 months: work Rounds 20 through 28 before increase.For 6-12 months: work Rounds 20 through 30 before increase.

  5. Round 29

    Increase shell round Chain 1, single crochet in slip stitch space, skip 2 stitches, 7 double crochet in next single crochet, skip 2 stitches, repeat around, slip stitch to join. (10 sc + 10 shells of 7 dc = 80 contact points)From Round 29 forward, the shell pattern uses 8 stitches per repeat.

    Key2
    sc
    single crochet: Insert hook into stitch, yarn over and pull up a loop (2 loops on hook), yarn over and pull through both loops. A short, tight stitch.
    dc
    double crochet: Yarn over, insert hook, yarn over and pull up a loop (3 loops), yarn over and pull through 2 loops (2 loops remain), yarn over and pull through remaining 2 loops. This is your main skirt stitch.
  6. Round 30

    Chain 3 (counts as double crochet), 3 double crochet in same stitch, single crochet in center (4th) double crochet of next shell, chain 2, single crochet in center double crochet of next shell, 7 double crochet in next single crochet, repeat around, slip stitch to chain-3 to join.

  7. Round 31

    Chain 1, single crochet in slip stitch space, 7 double crochet in next single crochet, single crochet in next chain-2 space, repeat around, slip stitch to join. (80 contact stitches)

  8. Round 32

    through 36: Continue in established 7-double crochet shell pattern, alternating Rounds 30 and 31.For 6-12 months: work through Round 39 before hem edging.

Checkpoint: The skirt from waist to bottom should measure approximately 5.5 inches (14 cm) for the 3-6 month size. Total length from neckline to bottom should be approximately 11 to 12.5 inches.

Section 8: Attach the Bow

Using the bow you made earlier, position it at the center front of the waist eyelet row. Thread the tail onto a tapestry needle and sew the bow to the dress front through several stitches on the wrong side. Knot firmly and weave in all ends.

Section 9: Waist Cord

Thread your crocheted cord or ribbon through the eyelet holes of Round 17. Begin and end at the center front, tying a small bow on top of the crocheted bow. Trim ribbon ends at an angle to prevent fraying.

Making up

  1. Step 1Weave in all remaining ends on the wrong side using your tapestry needle. Run each tail through at least 2 inches of adjacent stitches in different directions to prevent unraveling.
  2. Step 2For acrylic yarn: Wet-block by submerging the dress in cool water. Gently squeeze out excess water without wringing. Pin to a foam mat or towel at the finished dimensions and allow to dry completely before unpinning.
  3. Step 3For cotton yarn: Wet-block the same way. Cotton benefits from slightly longer blocking time. You may press lightly with a cool iron and damp pressing cloth while still damp.
  4. Step 4Very important: Pin the hem scallops individually outward so each petal fans open fully. Pin the sleeve and neckline scallops the same way. This step is essential for achieving that gorgeous lacy look.

Notes from the pattern

  • The suggested hook is a US E-4/3.5 mm, but the pattern explicitly allows sizing up or down to hit gauge, which matters more here than usual since four sizes share one set of instructions.
  • Four stitch markers go in during Round 2 of the yoke and mark the raglan seam pairs; keep all four in place and re-check them at every increase round across the 12 rounds of Section 1.
  • Yarn A carries the yoke, waistband and skirt, while Yarn B is reserved for the hem edging, sleeve edging and bow; fasten off Yarn A fully before joining Yarn B so the colour change sits exactly at the seam.
  • Written instructions follow the 3-6 month size throughout, with other sizes given in brackets; pick one size column at the start and stay with it through every round to avoid cross-referencing errors.

The essentials

Rounds
33
Parts
9
Level
Intermediate
Time
12-18 hours
Hook
7 mm
Yarn
DK

Stitches you will use

  • Raglan increases in joined rounds Worked through the 12 rounds of Section 1, with eight increase stitches added every other round; watch the four stitch markers closely so the sleeve and body sections stay the correct width.
  • Shell stitch (5 double crochet into one stitch) Forms the 8 rounds of Section 4's skirt; watch that stitches skipped between shells stay even, or the scallops will sit unevenly around the round.

Troubleshooting

The shells along the hem or sleeve edging look uneven or lopsided rather than forming matching scallops.

This usually comes from skipping an inconsistent number of stitches between shells; count the skip before each 5 double crochet group and adjust only at the final shell where the round joins.

The raglan seams on the yoke drift out of line or the underarm separation puckers.

A stitch marker has likely slipped during the 12 rounds of yoke increases; re-check that all four markers still sit at the eight increase stitches before working the next round.

The finished hem edging cups inward instead of lying flat.

The scallop count has drifted from the 10 scallops specified in Round 1 of the hem; unpick back to the join and respace the single crochet and chain-2 points evenly before reworking.

Substituting yarn

4-ply (fingering) cotton
Produces a smaller, denser dress; drop to a smaller hook around 3 mm, and expect more rounds needed to reach the same finished size, with less yardage used overall.
Aran or worsted weight acrylic
Gives a bulkier fabric with larger, more pronounced shells; move up to roughly a 4-4.5 mm hook and budget extra skeins beyond the DK yardage listed, since the thicker yarn uses more length per stitch.
Bamboo-cotton blend, DK weight
Keeps a similar gauge to the standard DK yarn with the same E-4/3.5 mm hook, but gives softer drape than pure cotton and slightly less crisp stitch definition in the shell repeat.

Washing and care

  • acrylic yarn, machine wash on a cool, gentle cycle and lay flat to dry; avoid the tumble dryer, as heat can flatten the shell stitch texture permanently.
  • cotton yarn, hand wash in cool water, roll in a towel to press out excess moisture, then pin to the finished dimensions and let dry flat; store folded rather than hung so the lacy hem does not stretch out of shape.

FAQs

Questions

What is the difference between the US and UK terms used in this pattern?

US single crochet corresponds to UK double crochet, and US double crochet corresponds to UK treble crochet. The shell stitch's five double crochets become five treble crochets in UK terminology.

Which size does the written pattern follow?

The main instructions are written for the 3-6 month size, where Round 1 of the yoke produces 60 single crochet stitches. Figures for the newborn, 6-12 month and other sizes appear in brackets throughout.

How long does this dress realistically take to make?

An experienced crocheter can expect 12 to 18 hours for the newborn to 3-month size, and up to 22 hours for the largest size. The pattern is designed to be broken into sessions, one for the yoke, one for the skirt, and one for the edgings.

Can the dress be made in cotton instead of acrylic?

Yes; cotton gives the shell pattern a crisper, more defined drape than acrylic. It may need slightly longer blocking time to hold its shape once washed.

What are the stitch markers used for?

Four stitch markers placed in Round 2 of the yoke track the raglan seam pairs through the 12 rounds of increases. They keep the eight increase stitches per round correctly aligned at the sleeve and body divisions.

These answers came from whoever first published the pattern, kept word for word.