Baby Romper and Cardigan Crochet Pattern

Why you'll love it

The romper is two identical panels, so it is easy to make and fit.
Flutter straps with shell ruffles add a sweet, feminine touch.
Crotch buttons make diaper changes simple.
The cardigan's T-shaped pieces have built-in sleeves.
Scalloped edges and layered flowers tie the set together.

About the designer

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Last updated November 6, 2026

Materials needed

Tools

4.0 mm (US G-6) crochet hook
Tapestry needle
Scissors
Stitch markers
Two 15 mm buttons for the romper straps, three 10 mm buttons for the crotch, and three 15 mm buttons for the cardigan
Sewing needle and thread

Gauge & finished measurements

Gauge: 16 hdc and 13 rows = 4 in (10 cm), and 18 dc and 10 rows = 4 in (10 cm), in DK yarn with a 4.0 mm hook. Size depends on gauge.

The pattern

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Romper Panels (make 2)

Foundation and Row 1: With cream, ch 12. Hdc in the 3rd ch from the hook and in each ch across. (10 hdc)
Rows 2-7: Ch 2 (does not count), turn. 2 hdc in each of the first 2 stitches, hdc across to the last 2, 2 hdc in each of the last 2 stitches. Repeat for 6 rows, adding 4 stitches each row. (34 hdc after Row 7)
Rows 8-9: Row 8: ch 2, turn, 2 hdc in each of the first 2 stitches, hdc across to the last 2, 2 hdc in each of the last 2 (38). Row 9: ch 2, turn, 2 hdc in the first stitch, hdc across to the last stitch, 2 hdc in the last (40). (40 hdc after Row 9)
Rows 10-26: Ch 2, turn, hdc in each stitch across. Repeat for 17 rows. (40 hdc in each row)
Row 27: Ch 2, turn, [hdc in the next 3 stitches, dec] 8 times. (32 hdc)
Rows 28-31: Ch 2, turn, hdc in each stitch across. Repeat for 4 rows. Fasten off. (32 hdc in each row)

Romper Finishing and Flutter Straps

Side seams: Place the two panels right sides together and sew the side edges from Row 9 to Row 31 on both sides. Leave Rows 1-8 open for the legs. Turn right side out. (2 side seams)
Crotch bands: Front: join cream at the foundation edge. Row A: sc in each of the 10 stitches. Row B: ch 1, turn, sc in the first stitch, [ch 1, skip 1, sc in the next 2 stitches] 3 times. Back: work 2 rows of 10 sc along the back foundation edge. Sew three 10 mm buttons to the back band. (10 sc with 3 buttonholes)
Leg and top edging: Join cream at the crotch. Sc evenly around each leg opening, then *sc in the next 3 stitches, ch 3, sl st in the 3rd ch from the hook (picot); repeat from * around. Sc evenly around the top edge and armholes. (1 sc round + picot edge)
Strap Rows 1-2 (make 2): With cream, ch 36. Row 1: hdc in the 3rd ch from the hook and each ch across (34). Row 2: ch 2, turn, hdc across, working ch 2, skip 2 for a buttonhole over stitches 3-4. (34 hdc in each row)
Strap ruffle Rows 3-4: Row 3: turn, skip the first 7 stitches, join, ch 3 (counts as dc), dc in the same stitch, 2 dc in each of the next 19 stitches (40). Row 4: ch 1, turn, *sc in the next stitch, skip 1, 5 dc in the next stitch, skip 1; repeat from * 9 more times. Fasten off. (10 shells)

Cardigan Back

Foundation and Row 1: With pink, ch 47. Dc in the 4th ch from the hook (the skipped chains count as a dc) and in each ch across. (45 dc)
Rows 2-10: Ch 3 (counts as dc), turn, dc in each stitch across. Repeat for 9 rows. At the end of Row 10, do not turn. With a separate strand, ch 18 and join it with sl st to the top of the first stitch of Row 10, at the opposite edge. (45 dc in each row)
Row 11 (sleeves): With the working yarn, ch 20. Turn, dc in the 4th ch from the hook and the next 16 ch (18 dc including the skipped chains), dc in each of the 45 body stitches, then dc in each of the 18 chains at the other edge. (81 dc)
Rows 12-19: Ch 3, turn, dc in each stitch across. Repeat for 8 rows. Fasten off. (81 dc in each row)

Cardigan Fronts (make 2, mirrored)

Foundation and Rows 1-10: With pink, ch 24. Row 1: dc in the 4th ch from the hook and each ch across (22). Rows 2-10: ch 3, turn, dc across (22). End the second front on the opposite edge so the sleeves are mirrored. (22 dc in each row)
Row 11 (sleeve): At the side (armhole) edge, ch 20. Turn, dc in the 4th ch from the hook and the next 16 ch (18), then dc in each of the 22 front stitches. (40 dc)
Rows 12-16: Ch 3, turn, dc in each stitch across. Repeat for 5 rows. (40 dc in each row)
Rows 17-19 (neck): Row 17: work across, leaving the 8 stitches at the center front (neck) edge unworked (32). Rows 18-19: ch 3, turn, dc across (32). Fasten off. (32 dc after Row 19)

Cardigan Finishing and Flowers

Seams: Sew the 32 stitches at the top of each front to the matching 32 stitches at each end of the back for the shoulder and sleeve-top seams. Sew the underside of each sleeve (the 18 foundation chains) front to back, and sew the side seams from Row 1 to Row 10. (2 shoulder, 2 sleeve and 2 side seams)
Hem and cuff scallops: Hem: join pink at a lower front corner and work along the foundation edges of the fronts and back: *sc in the next stitch, skip 1, 5 dc in the next stitch, skip 1; repeat from * 21 more times, sc in the last stitch. Cuffs: work 36 sc evenly around each sleeve opening, join, then repeat [sc, skip 1, 5 dc in the next, skip 1] 9 times, join. (22 hem scallops; 9 per cuff)
Front band: Row 1: join pink at the lower right front. Sc evenly up the right front (38 sc), around the neckline, and down the left front (38 sc). Row 2: ch 1, turn, and on the right front work sc 14, [ch 2, skip 2, sc 6] 2 times, ch 2, skip 2, sc 6 over the 38 front stitches, then sc in the rest. Row 3: sc in each stitch and 2 sc in each ch-2 space. (38 sc per front with 3 buttonholes)
Layered flower (make 2): With pink, make a MR. Round 1: ch 1, 10 sc, join (10). Round 2: *(hdc, 2 dc, hdc) in the next stitch, sl st in the next stitch; repeat from * 4 more times. Round 3: change to cream, working behind the petals, *sc around the post of the next sl st, ch 4; repeat from * 4 more times, join. Round 4: (sc, hdc, 4 dc, hdc, sc) in each ch-4 loop. Fasten off. (5 pink petals + 5 cream petals)
Leaf (make 2): With green, ch 6. Sl st in the 2nd ch, sc, hdc, dc, 3 hdc in the last ch. Along the other side: dc, hdc, sc, sl st. Fasten off, leaving a tail. (11 stitches per leaf)

Abbreviations

This pattern is written in US terms. Your current view: US.

US	UK	Meaning
MR	MR	magic ring (adjustable ring) · how to
ch	ch	chain · how to
sl st	ss	slip stitch · how to
sc	dc	single crochet (UK double crochet) · how to
hdc	htr	half double crochet (UK half treble) · how to
dc	tr	double crochet (UK treble) · how to
dec	dec	decrease: work 2 stitches together (invisible decrease in amigurumi)
st(s)	st(s)	stitch(es)

Assembly

1
Romper: sew a flower and leaf to the center front, just below the top edge.
2
Cardigan: sew a flower and leaf to the left front, below the shoulder.
3
Sew the cardigan buttons to the left band opposite the buttonholes.
4
Weave in all ends and lightly steam both pieces, shaping the scallops and flutter ruffles.

Important notes

Tip: This is an original pattern inspired by the photo. Hidden details are interpreted from the image, and the pattern has not been physically test-crocheted.
Tip: Abbreviations (US terms): ch = chain, sc = single crochet, hdc = half double crochet, dc = double crochet, sl st = slip stitch, MR = magic ring, dec = decrease.
Tip: The ch 2 at the start of hdc rows does not count as a stitch. The ch 3 at the start of dc rows counts as a dc.
Tip: Sizing assumes a 3-6 month chest of about 17 in (43 cm). Babies vary, so measure if possible.
Tip: Safety: buttons and flowers can be choking hazards. Sew everything very securely and always supervise babies wearing embellished clothing.

Pattern FAQ

Why make the romper in two panels?

Two identical flat panels are easy to work and measure, and you can try them against the baby before sewing the side seams.

How do the cardigan sleeves work?

At underarm height, chains added at the side edges are worked into the next row, so each piece grows a short sleeve. Sewing the shoulder and underarm seams closes the sleeves.

How do I make a larger size?

Use a 4.5 mm hook for about 6-12 months. Add 3 body rows to each romper panel, 2 rows to the cardigan below the sleeves, and 4 chains to each strap.

How do I wash the set?

Machine wash on a gentle cycle in cool water with baby detergent, or hand wash. Lay flat to dry and reshape the ruffles and scallops while damp.

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Baby Romper and Cardigan Crochet Pattern

Why you'll love it

About the designer