Sand Dollar Puff Swing Coat: Free Crochet Pattern for a Vintage Sunburst Poncho Jacket

Sand Dollar Puff Swing Coat: Free Crochet Pattern for a Vintage Sunburst Poncho Jacket

Introduction

If you have ever wanted to make a coat that feels like a warm, lilac cloud with a 1970s soul, this is the project for you. The Sand Dollar Puff Swing Coat is crocheted as one big, beautiful circle — a puff-stitch sand-dollar sunburst blooms at the center, surrounded by concentric rings of raised puff bands and airy openwork. Then the magic happens: you fold that circle in half, seam the shoulders, and suddenly it becomes a soft, open-front poncho jacket with an easy A-line swing.

This pattern is written for crocheters who have mastered the basic stitches and are ready for a satisfying, meditative project — the kind you work on while listening to music, watching the circle grow round after round. The finished coat is drapey and light, with a fuzzy mohair-silk halo, a scalloped picot hem, and wide sleeves that swing as you walk. It is one size fits most adults, unisex, and forgiving of fit — a true heirloom piece you will reach for every cool evening.

Materials Needed

• Yarn: Mohair-silk blend lace weight (approx. 420 m / 460 yd per 50 g skein), held DOUBLE throughout — meaning you work with two strands at once as if they were one yarn. Sample uses approx. 1,150 g total (23 x 50 g skeins) in lilac (single monochrome colorway).
• Main hook: 5.5 mm (US I-9) crochet hook — for the main circle and sleeves.
• Edging hook: 5.0 mm (US H-8) crochet hook — for the hem edging, cuffs, and front/neck edging.
• Stitch markers (at least 6) — small clips or safety pins used to mark important spots.
• Tapestry needle — a large blunt needle with an eye big enough for yarn, used to weave in ends.
• Scissors — for cutting yarn.
• Blocking mats and pins — for shaping the finished circle and coat.
• Finished size: One size fits most adults (unisex). Body sweep approx. 142 cm / 56 in around at hem; center-back length approx. 68 cm / 27 in; shoulder seam approx. 42 cm / 16.5 in from center. Circle diameter approx. 71 cm / 28 in (radius approx. 35.5 cm / 14 in).

Abbreviations and Beginner Glossary

• ch — chain: yarn over the hook and pull it through the loop on your hook. Creates a small link.
• sl st — slip stitch: insert hook into the stitch, yarn over, and pull through both the stitch and the loop on your hook at once. Used to join rounds.
• sc — single crochet: insert hook into stitch, yarn over, pull up a loop (2 loops on hook), yarn over, pull through both loops.
• hdc — half double crochet: yarn over, insert hook, pull up a loop (3 loops on hook), yarn over, pull through all 3 loops.
• dc — double crochet: yarn over, insert hook, pull up a loop (3 loops on hook), yarn over, pull through 2 loops, yarn over, pull through last 2 loops.
• sc2tog — single crochet two together (a decrease): insert hook into first stitch, pull up a loop, insert hook into next stitch, pull up a loop (3 loops on hook), yarn over, pull through all 3 loops. Turns two stitches into one.
• puff — puff stitch: [yarn over, insert hook in indicated stitch, yarn over, pull up a loop to the height of a dc] 3 times in the same stitch (7 loops on hook), yarn over and draw through all 7 loops, then ch 1 to close. The closing ch does not count as a stitch.
• puff-cl — puff cluster: work 2 puffs into the same stitch, with ch 1 between them.
• magic ring — an adjustable loop: wrap yarn around your fingers to form a loop, work stitches into the loop, then pull the tail tight to close the center hole.
• st(s) — stitch(es).
• sp(s) — space(s), such as a ch-1 sp (the small gap made by a chain).
• join — connect the end of a round to its beginning with a sl st.
• fasten off — cut the yarn leaving a tail, then pull the tail through the last loop to secure it.
• standing dc — starting a round without a ch-3 by making a dc directly into the first stitch (or use ch 3 as the first dc, as written).

Gauge

Gauge: In the puff-stitch circle pattern with yarn held double on a 5.5 mm hook: 12 sts and 7 rounds = 10 cm / 4 in measured over dc rounds after light blocking. Each puff-stitch round adds approx. 2.5 cm / 1 in to the radius.

Why gauge matters: Gauge is how big your stitches come out. If your stitches are tighter or looser than the pattern expects, your circle will be smaller or larger, and the coat may not fit. How to check: Work Rounds 1–6 of the circle. The piece should measure approx. 10 cm / 4 in across after Round 6. If it is smaller, go up one hook size; if larger, go down one. Always make this swatch before starting the full coat.

Beginner Tips Before You Start

• Hold two strands as one. Pull one strand from the outside and one from the inside of the same skein, or use two skeins. Treat the doubled strand as a single working yarn.
• Do not pull the puffs too tight. Puffs should be plump and even. If you yank the closing chain, the puff flattens and the texture disappears.
• Use stitch markers to track rounds. Place a marker in the first stitch of each round so you always know where the round begins and ends.
• Count after every increase round. The stitch counts are your safety net — check them before moving on.
• Block the circle before seaming. A good block opens the lace, evens the puffs, and makes the folding and seaming much easier.
• Relax your tension. Mohair-silk is slippery and haloed; a relaxed hand keeps the fabric drapey rather than stiff.

Step-by-Step Instructions

Part 1: The Sand Dollar Circle (worked flat in the round; turning is NOT required)

Set-up: With 5.5 mm hook and doubled yarn, make a magic ring.

Round 1 (center): Ch 3 (counts as first dc), work 11 dc into ring, join with sl st to top of ch-3. (12 dc)

Round 2 (first puff ring): Ch 3, puff in same st as join, *ch 1, puff in next dc; repeat from * around, ch 1, join with sl st to top of ch-3. (12 puffs, 12 ch-1 sps)

Round 3 (sunburst rays begin): Ch 3, dc in same st, ch 1, *2 dc in next ch-1 sp, ch 1; repeat from * around, join. (24 dc, 12 ch-1 sps)

Round 4 (ray points): Ch 1, sc in same st, *ch 3, skip next ch-1 sp, sc in next dc, ch 3, sc in next dc; repeat from * around, join with sl st to first sc. (24 sc, 24 ch-3 sps) This creates the pointed sunburst edge of the sand dollar.

Round 5: Sl st into first ch-3 sp, ch 3, 2 dc in same sp, ch 1, *3 dc in next ch-3 sp, ch 1; repeat from * around, join. (72 dc, 24 ch-1 sps)

Round 6 (puff ring): Ch 3, puff in same st, ch 1, *puff in next dc, ch 1, puff in next dc, ch 1, puff in next dc, ch 1, [puff, ch 1, puff] in next ch-1 sp, ch 1; repeat from * around, join. (approx. 96 puffs) This is the last round of the dense sunburst center; the circle should now measure approx. 10 cm / 4 in radius.

Round 7 (openwork begins): Ch 4 (counts as dc + ch 1), *dc in next ch-1 sp, ch 1; repeat from * around, join to 3rd ch of ch-4. (96 dc, 96 ch-1 sps)

Round 8 (increase): Ch 3, dc in same st, ch 1, *dc in next ch-1 sp, ch 1, 2 dc in next ch-1 sp, ch 1; repeat from * around, join. (144 dc, 144 ch-1 sps)

Round 9 (puff band): Ch 3, puff in same st, ch 1, *puff in next dc, ch 1; repeat from * around, join. (144 puffs)

Round 10: Ch 4, *dc in next ch-1 sp, ch 1; repeat from * around, join. (144 dc, 144 ch-1 sps)

Round 11 (increase): Ch 3, dc in same st, ch 1, *dc in next ch-1 sp, ch 1, dc in next ch-1 sp, ch 1, 2 dc in next ch-1 sp, ch 1; repeat from * around, join. (192 dc, 192 ch-1 sps)

Round 12 (puff band): Ch 3, puff in same st, ch 1, *puff in next dc, ch 1; repeat from * around, join. (192 puffs)

Round 13: Ch 4, *dc in next ch-1 sp, ch 1; repeat from * around, join. (192 dc, 192 ch-1 sps)

Round 14 (increase): Ch 3, dc in same st, ch 1, *[dc in next ch-1 sp, ch 1] 3 times, 2 dc in next ch-1 sp, ch 1; repeat from * around, join. (240 dc, 240 ch-1 sps)

Round 15 (puff band): Ch 3, puff in same st, ch 1, *puff in next dc, ch 1; repeat from * around, join. (240 puffs)

Round 16: Ch 4, *dc in next ch-1 sp, ch 1; repeat from * around, join. (240 dc, 240 ch-1 sps)

Round 17 (increase): Ch 3, dc in same st, ch 1, *[dc in next ch-1 sp, ch 1] 4 times, 2 dc in next ch-1 sp, ch 1; repeat from * around, join. (288 dc, 288 ch-1 sps)

Round 18 (puff band): Ch 3, puff in same st, ch 1, *puff in next dc, ch 1; repeat from * around, join. (288 puffs)

Round 19: Ch 4, *dc in next ch-1 sp, ch 1; repeat from * around, join. (288 dc, 288 ch-1 sps)

Round 20 (increase): Ch 3, dc in same st, ch 1, *[dc in next ch-1 sp, ch 1] 5 times, 2 dc in next ch-1 sp, ch 1; repeat from * around, join. (336 dc, 336 ch-1 sps)

Round 21 (puff band): Ch 3, puff in same st, ch 1, *puff in next dc, ch 1; repeat from * around, join. (336 puffs)

Round 22: Ch 4, *dc in next ch-1 sp, ch 1; repeat from * around, join. (336 dc, 336 ch-1 sps)

Round 23 (final increase): Ch 3, dc in same st, ch 1, *[dc in next ch-1 sp, ch 1] 6 times, 2 dc in next ch-1 sp, ch 1; repeat from * around, join. (384 dc, 384 ch-1 sps)

Round 24 (final puff band): Ch 3, puff in same st, ch 1, *puff in next dc, ch 1; repeat from * around, join. (384 puffs)

Round 25 (hem foundation): Ch 4, *dc in next ch-1 sp, ch 1; repeat from * around, join. (384 dc, 384 ch-1 sps)

Fasten off. Do NOT cut the yarn short — leave a 30 cm / 12 in tail for the hem edging. The circle should now measure approx. 71 cm / 28 in in diameter (radius approx. 35.5 cm / 14 in). Block the circle flat to this measurement and let dry completely.

Part 2: Hem Edging (worked around the outer edge of the circle)

With 5.0 mm hook, join yarn with sl st to any ch-1 sp of Round 25.

Round 1: Ch 1, sc in same sp, *ch 2, sc in next ch-1 sp; repeat from * around, join with sl st to first sc. (384 sc, 384 ch-2 sps)

Round 2: Ch 1, sc in same st, *3 dc in next ch-2 sp, sc in next sc; repeat from * around, join. (384 sc, 384 3-dc groups) This is a soft picot-scallop hem.

Fasten off and weave in ends.

Part 3: Folding and Shoulder Seams

Step 1: Lay the blocked circle flat, right side up, with the sunburst center facing you. The circle is the entire body of the coat.

Step 2: Fold the circle in half, right sides together, matching the hem edge to itself. The fold line runs from the center of the sunburst to the hem — this fold becomes the center-back of the coat.

Step 3: The two open edges of the folded half-circle are the front opening. Mark the two points where the curved edge meets the straight fold line: these are the shoulder points, approx. 42 cm / 16.5 in from the center on each side.

Step 4: Measure 18 cm / 7 in down from each shoulder point along the curved edge and place a marker. These are the armhole openings.

Step 5: Seam the shoulders: with right sides together and using a whip stitch or sl st seam with the 5.0 mm hook, join the two curved edges from the shoulder point inward toward the center for 10 cm / 4 in on each side. This creates the shoulder line and the neck opening (approx. 20 cm / 8 in wide at the neck).

Step 6: Do NOT seam the armhole openings (the 18 cm / 7 in marked sections) — leave them open for the sleeves.

Step 7: Do NOT seam the front opening below the armholes — this remains open as the coat front.

Part 4: Sleeves (worked in the round from the armhole)

With 5.5 mm hook and doubled yarn, join yarn at the underarm of one armhole.

Round 1: Ch 1, work sc evenly around the armhole edge, approx. 48 sc; join with sl st to first sc. (48 sc)

Round 2: Ch 3, dc in each sc around, join. (48 dc)

Round 3 (puff band): Ch 3, puff in same st, ch 1, *puff in next dc, ch 1; repeat from * around, join. (48 puffs)

Round 4: Ch 4, *dc in next ch-1 sp, ch 1; repeat from * around, join. (48 dc, 48 ch-1 sps)

Round 5: Ch 3, dc in each ch-1 sp around, join. (48 dc)

Round 6 (puff band): Ch 3, puff in same st, ch 1, *puff in next dc, ch 1; repeat from * around, join. (48 puffs)

Round 7: Ch 4, *dc in next ch-1 sp, ch 1; repeat from * around, join. (48 dc, 48 ch-1 sps)

Round 8 (cuff decrease): Ch 1, sc in same sp, *sc in next ch-1 sp, sc2tog over next 2 ch-1 sps; repeat from * around, join. (approx. 36 sc)

Round 9 (cuff): Ch 1, sc in each sc around, join. (36 sc)

Round 10 (cuff edging): Ch 1, sc in same st, *ch 2, skip next sc, sc in next sc; repeat from * around, join. Fasten off.

Repeat Part 4 for the second armhole.

Part 5: Front Opening and Neck Edging

With 5.0 mm hook, join yarn at the bottom right front corner (hem edge of the front opening).

Round 1: Ch 1, sc evenly up the right front edge, around the neck opening, and down the left front edge, working approx. 1 sc per st and 2 sc in each corner; join with sl st to first sc.

Round 2: Ch 1, sc in each sc around, working 2 sc in each corner; join. Fasten off.

Round 3 (optional picot): Ch 1, sc in same st, *ch 2, skip next sc, sc in next sc; repeat from * around, join. Fasten off.

Assembly and Finishing

Weave in ends: Thread each yarn tail onto the tapestry needle and run it back and forth through the wrong side of the fabric for about 5 cm / 2 in, then trim. Never knot the tails — knots create lumps.

Blocking: Mist the finished coat lightly with water, pin the hem and sleeves to the measurements given (hem sweep 142 cm / 56 in, length 68 cm / 27 in), and dry flat. The mohair-silk will bloom and soften the puff texture. Do not hang the wet coat — it will stretch.

Optional closure: Add a single large vintage-style lilac button at the neckline with a crocheted loop closure (ch 6, sl st to form a loop).

Care: Hand wash cold, gently squeeze (do not wring), and dry flat away from direct heat.

Pro Tips and Variations

• Color changes: Work the sunburst center in a contrast color and the outer rounds in lilac, or change color at each puff band for a striped 1970s look. Change color at the end of a round, joining the new color with a sl st.
• Size adjustments: For a shorter coat, omit Rounds 23–25 and work the hem edging directly after Round 22. For a longer coat, add one more increase round (following the established increase pattern) and one more puff band before the hem. Armhole depth can be adjusted by moving the 18 cm / 7 in markers up or down by 2 cm / 0.75 in.
• Yarn substitution: Any lace-weight yarn held double will work, but choose a fuzzy or silk-blend yarn for the same halo and drape. Always re-check gauge with a swatch.
• Edging variation: Replace the picot-scallop hem with a simple sc border for a cleaner, more modern finish, or add a shell edging (5 dc in one space) for extra vintage flair.