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05/26/25 •

Spectrum Stitch Crochet Swoncho | Part 8 | Prism Make-Along 2025 Free Pattern

Spectrum Stitch Crochet Swoncho – Part 8: Let’s Create the Sleeves!

Crocheters, you’ve made it to Part 8 of the Spectrum Stitch Swoncho, and you are on a roll! 🎉 Today, we get to bring this swoncho to a close by adding sleeves!

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Scroll down to get started with Part 8 of the Spectrum Stitch Swoncho! I can’t wait to see your stitches come to life—be sure to share your progress using #prismmakealong and tag me @themarlybird. 💛

Spectrum Stitch Crochet Swoncho

Designed by Marly Bird

SKILL LEVEL

Intermediate

MEASUREMENTS

To Fit Sizes

Extra-Small/Small/Medium 28-38” [71-96.5 cm] bust

Large/Extra-Large 40-46” [101.5-117 cm] bust

2/3 Extra-Large 48-54” [122-137 cm] bust

4/5 Extra-Large 56-62” [142-157.5 cm] bust

Sample made in size 2 / 3 Extra-Large

Gauge 

16 split sc by 16 rounds = 4” [10 cm] by 4” [10 cm] in split single crochet; use any size hook to obtain the gauge. 

MATERIALS

Crochet Yarn 

WeCrochet Swish DK  (100% Superwash Merino Wool, 123 yds / 113 m, 1.76 oz/ 50 g, CYCA# 3 DK) — crochet

  • 7 (8, 10, 12) balls: #24957 Gulfstream (A)
  • 2 (2, 2, 2) balls: #24636 Marble Heather (B)
  • 2 (2, 2, 2) balls: #c25578 Marina (C)
  • 1 (2, 2, 2) balls: #28643 Throne (D)
  • 1 (1, 1, 2) balls: #28632 Haze Heather (E)
  • 2 (2, 2, 2) balls: #24313 Cobblestone Heather (F)
  • 1 (2, 2, 2) balls: #c26062 Wonderland Heather (G)
  • 1 (1, 1, 1) ball: #24064 White (H)
  • 1 (1, 1, 1) ball: #c25585 Rainforest Heather (I)
  • 1 (1, 1, 1) ball: #24951 Peapod (J)

Hook

Size U.S. H/8 [5 mm]  or size required for gauge. 

Notions 

Tapestry needle, Stitch Markers

ABBREVIATIONS

Ch – Chain(s) 

PM – Place Marker

RS – Right Side 

Sc – Single Crochet

Sl st – Slip Stitch

Sp(s) – Space(s) 

St(s) – Stitch(es)

Tch – Turning Chain

WS – Wrong Side

SPECIAL STITCHES 

⭐Back Loop Only (blo): This is the furthest loop to you of the top 2 loops of the stitch indicated, regardless if you are on the RS or WS.

⭐️Chain (Ch): With slip knot or free loop on hook, yarn over hook and pull through loop on hook.

⭐️Single Crochet (Sc): Insert hook into indicated stitch, yarn over and pull up a loop, yarn over and draw through 2 loops on hook.

⭐️Slip Stitch (Sl st): Insert hook into indicated stitch, yarn over and pull up a loop and draw through loop on hook. 

⭐️Split Single Crochet (Split sc): Insert hook into indicated stitch between the two legs of the stitch, yarn over and pull up a loop, yarn over and draw through both loops on hook. 

⭐️Split Single Crochet (Split Sc): Insert hook into indicated titch between the two legs of the stitch, yarn over and pull up a loop, yarn over and draw through both loops on hook.

⭐️Back Loop Single Crochet/Split Single Crochet/Back Loop Single Crochet Decrease (Sc3tog): Insert hook into the back loop of stitch indicated, yarn over and pull up a loop,  insert hook into next stitch between the two legs of the stitch, yarn over and pull up a loop, insert hook into the back loop of the next indicated st, yarn over and pull up a loop, draw the last loop through 3 loops on hook – 2 stitches decreased.

NOTES

  • Project is worked in joined rounds of split single crochet.  Join is made by removing hook from free loop, insert hook under top 2 loops of first st from back to front, replace free loop and pull through. 
  • Place marker in first stitch throughout project.
  • Change color when there are 2 loops left on the hook of the previous color.
  • Sweater is stranded color work not tapestry colorwork.  Be sure to keep your floats loose and not too tight.  If they are tight you will reduce the elastic nature of the fabric and your project might not fit you.  
  • Do not crochet over the floats or the fabric will become too thick! 
  • It is easy to tighten up your split single crochet stitches, be sure to pull up a longer loop to keep your stitches from getting too small.  If your stitches are too tight, you will not see the colorwork as clearly and it will be difficult to insert your hook. You can always go up a hook size or two to keep your stitches from getting too small.  

VIDEO TUTORIAL

Colorful graphic with "Marly Bird's Prism Make-Along: Spectrum Stitch Crochet Swoncho Part 8 SLEEVES" in large text. A red YouTube play button sits over the text, while geometric shapes decorate the vibrant background. -Marly Bird
Click Image for Video Tutorial

SPECTRUM STITCH CROCHET SWONCHO PATTERN – PART 8

SLEEVES

Round 1:  Join color A with sc to the unused loops of the 15th ch of the underarm (or any odd of sts near the middle of your underarm chs, in a column of the split sc from the body), sc in each ch across to your sleeve on the yoke, sc blo in each sc blo and split sc each split sc across sleeve to underarm ch, sc in each ch across to beginning, join to first sc –  56 (58, 64, 68) sts. 

Rounds 2-3: *Split sc in next sc, sc blo in next sc; repeat from * around, join to first sc.

SLEEVES

Round 1:  Join color A with sc to the unused loops of the 15th ch of the underarm (or any odd of sts near the middle of your underarm chs, in a column of the split sc from the body), sc in each ch across to your sleeve on the yoke, sc blo in each sc blo and split sc each split sc across sleeve to underarm ch, sc in each ch across to beginning, join to first sc –  56 (58, 64, 68) sts. 

Rounds 2-3: *Split sc in next sc, sc blo in next sc; repeat from * around, join to first sc.

Sleeve Shaping

Round 4: Split sc in first split sc, [sc blo in next sc blo, split sc in next split sc] 3 times, sc3tog over next 3 sts (first leg as to sc blo, second leg as to split sc, third leg as to sc blo), *split sc in next sc, sc blo in next sc; repeat from * around, join to first sc – 54 (56, 62, 66) sts. 

Round 5: Split sc in first split sc, *sc blo in next sc, split sc in next sc; repeat from * to last 9 sts, sc3tog over next 3 sts (first leg as to sc blo, second leg as to split sc, third leg as to sc blo), [split sc in next split sc, sc blo in next sc blo] 3 times, join to first sc – 52 (54, 60, 64) sts. 

Round 6: Split sc in first split sc, [sc blo in next sc blo, split sc in next split sc] twice, sc3tog over next 3 sts (first leg as to sc blo, second leg as to split sc, third leg as to sc blo), *split sc in next sc, sc blo in next sc; repeat from * around, join to first sc – 50 (52, 58, 62) sts. 

Round 7: Split sc in first split sc, *sc blo in next sc, split sc in next sc; repeat from * to last 7 sts, sc3tog over next 3 sts (first leg as to sc blo, second leg as to split sc, third leg as to sc blo), [split sc in next split sc, sc blo in next sc blo] twice, join to first sc – 48 (50, 56, 60) sts. 

Round 8: Split sc in first split sc, sc blo in next sc blo, split sc in next split sc, sc3tog over next 3 sts (first leg as to sc blo, second leg as to split sc, third leg as to sc blo), *split sc in next sc, sc blo in next sc; repeat from * around, join to first sc – 46 (48, 54, 58) sts. 

Round 9: Split sc in first split sc, *sc blo in next sc, split sc in next sc; repeat from * to last 5 sts, sc3tog over next 3 sts (first leg as to sc blo, second leg as to split sc, third leg as to sc blo), split sc in next split sc, sc blo in next sc blo, join to first sc – 44 (46, 52, 56) sts. 

2-3 X and 4-5 X Only

Round 10: Split sc in first split sc, sc3tog over next 3 sts (first leg as to sc blo, second leg as to split sc, third leg as to sc blo), *split sc in next sc, sc blo in next sc; repeat from * around, join to first sc – – (—, 50, 54) sts. 

Round 11: Split sc in first split sc, *sc blo in next sc, split sc in next sc; repeat from * to last 3 sts, sc3tog over next 3 sts (first leg as to sc blo, second leg as to split sc, third leg as to sc blo), join to first sc – – (—, 48, 52) sts. 

All Sizes

Next Round: *Split sc in next sc, sc blo in next sc; repeat from * around, join to first sc.

Repeat the previous round for another 6 (6, 7, 7)” [15 (15, 17.5, 17.5) cm] or to desired length of sleeve. 

Fasten off and weave in ends.

🌈 Keep Hooking!

You’re nearly done, and it’s looking AMAZING. Let the next chart continue your story in bold, brilliant stitches.

🗓️ The next pattern section drops Thursday, May 29 at 12:00 PM ET—mark your calendar and keep those hooks moving! And remember, you’re not alone. Join the conversation and share your progress using #PrismMakeAlong and #MarlyBird.

Marly Bird

The One and Only, Marly

Marly is a knitwear and crochet designer (and yarn addict) that is here to help you learn how to knit and crochet in a way that's fun and approachable.

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