Crochet Pattern: Flattened Shell Hat in 4 Sizes

Woman looking down while wearing striped crochet hat and silver coat against a brick wall | Free crochet pattern: Flattened Shell Hat in 4 sizes in Cascade 220 Superwash Wave yarn by Underground CrafterThe Flattened Shell Hat uses a simple shell stitch pattern and a self-patterning yarn to make an easy hat in four sizes. This is a great starter hat project for a crochet beginner, or a tv/commuting project for a more advanced crocheter.

This post contains affiliate links. I may receive compensation (at no added cost to you) if you make a purchase using these links. Yarn for the sample was generously provided by Cascade Yarns.

A few weeks ago, Cascade Yarns sent me a box of yarns to try out. I have been a fan of Cascade 220 Superwash for a years (see the Anthology Blanket Knit-a-Long, or my free crochet patterns for the Rectangular Sampler Blanket, Mod 9-Patch Blanket, or Little Gracie Blanket for some examples). It’s a washable wool yarn that is a little thinner than most medium weight yarns, so you can make some very warm projects without much added bulk. (And, I love wool, but I’m not much for hand washing.) Well, it turns out the folks at Cascade have improved upon the classic with the addition of Cascade 220 Superwash Wave.

Smiling woman wearing striped crochet hat and silver coat against a brick wall | Free crochet pattern: Flattened Shell Hat in 4 sizes in Cascade 220 Superwash Wave yarn by Underground CrafterThis is a self-patterning version of the yarn which allows you to easily create the look of stripes without worrying about weaving in a bunch of ends. I had just one skein, so I decided to make a hat using a flattened shell stitch (hence the name).

Woman looking down while wearing striped crochet hat and silver coat against a brick wall | Free crochet pattern: Flattened Shell Hat in 4 sizes in Cascade 220 Superwash Wave yarn by Underground CrafterYou can see that the yarn has an almost tweedy look and the stripes range from very subtle to great contrast. I’ll definitely be using this yarn for some bigger projects in the future!

If you make your own Flattened Shell Hat, I’d love to see it! Share your progress and questions by tagging me on Facebook as @Underground Crafter, Instragram as @ucrafter, or Twitter as @ucrafter. You can also share a picture in the Underground Crafters Facebook group. Sign up for my weekly newsletter and get a coupon code for your choice of one of my premium patterns and other subscriber goodies. Plus, you’ll never miss one of my free patterns again!

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Flattened Shell Hat

Crochet Pattern by Underground Crafter

Smiling woman looking down while wearing striped crochet hat and silver coat against a brick wall | Free crochet pattern: Flattened Shell Hat in 4 sizes in Cascade 220 Superwash Wave yarn by Underground CrafterA simple shell pattern combines with a self-patterning yarn to make an easy striped hat.

 

Finished Sizes

  • Newborn (Infant, Adult Small, Adult Large). Photographed sample is size Adult Small.
    • Newborn: 13.25” (33.5 cm) hat circumference x 5.25” (13.5 cm) height.
    • Infant: 16.5” (42 cm) hat circumference x 7” (18 cm) height.
    • Adult Small: 19.5” (49.5 cm) hat circumference x 8.5” (21.5 cm) height.
    • Adult Large: 22.75” (58 cm) hat circumference x 9.25” (23.5 cm) height.

Materials

  • Cascade 220 Superwash Wave yarn (100% superwash wool, 3.5 oz/100 g/220 yd/201 m) – 1 (1, 2, 2) skein(s) in 107 Boston, or approximately 115 yd (185 yd, 265 yd, 335 yd)/105 m (169 m, 242 m, 306 m) in any light medium weight yarn.
  • US Size H-8/5 mm crochet hook, or size needed to obtain gauge.
  • Yarn needle.

Gauge

  • Through Rnd 4 = 4.25” (11 cm) diameter in pattern. For best fit, always check your gauge.

Abbreviations Used in This Pattern

  • BL – back loop only
  • ch – chain
  • dc – double crochet
  • rep – repeat
  • Rnd(s) – Round(s)
  • sc – single crochet
  • sc2tog – single crochet 2 stitches together – [Insert hook in next st, yo and draw up a loop] twice, yo and draw through all 3 loops on hook.
  • sk – skip
  • sl st – slip stitch
  • sp – space
  • st(s) – stitch(es)
  • yo – yarn over
  • * Repeat instructions after asterisk as indicated.
  • [] Repeat instructions between brackets as indicated.

Pattern Note

  • Ch 1 at beginning of Rounds does not count as a stitch.

Pattern Instructions

Hat – All Sizes

Increase from crown

  • Ch 4, sk 3 ch, sl st to next ch to form ring.
  • Rnd 1: Ch 1, 12 dc in ring, join with sl st to first dc. (12 sts)
  • Rnd 2: Ch 1, starting in first st, 2 dc in each st around, join with sl st to first dc. (24 sts)
  • Rnd 3: Ch 1, starting in first st, *2 dc in next st, dc in next st; rep from * around, join with sl st to first dc. (36 sts)
  • Rnd 4: Ch 1, starting in first st, *2 dc in next st, dc in next 2 sts; rep from * around, join with sl st to first dc. (48 sts)
  • Rnd 5: Ch 1, starting in first st, *2 dc in next st, dc in next 3 sts; rep from * around, join with sl st to first dc. (60 sts)
  • Rnd 6: Ch 1, starting in first st, *2 dc in next st, dc in next 4 sts; rep from * around, join with sl st to first dc. (72 sts) NEWBORN SIZE ONLY: CONTINUE TO RND 10 INSTRUCTIONS.
  • Rnd 7: Ch 1, starting in first st, *2 dc in next st, dc in next 5 sts; rep from * around, join with sl st to first dc. (84 sts) INFANT SIZE ONLY: CONTINUE TO RND 10 INSTRUCTIONS.
  • Rnd 8: Ch 1, starting in first st, *2 dc in next st, dc in next 6 sts; rep from * around, join with sl st to first dc. (96 sts) ADULT SMALL SIZE ONLY: CONTINUE TO RND 10 INSTRUCTIONS.
  • Rnd 9: Ch 1, starting in first st, *2 dc in next st, dc in next 7 sts; rep from * around, join with sl st to first dc. (108 sts) ADULT LARGE SIZE ONLY: CONTINUE TO RND 10 INSTRUCTIONS.

Work even

  • Rnd 10: Ch 1, starting in first st, *3 dc in next st, sk 2 sts; rep from * around, join with sl st to first dc. – 72 (84, 96, 108) sts
  • Rnd 11: Ch 1, starting in first st, *sc in next st, ch 1, sk 1 st, sc in next st; rep from * around, join with sl st to first sc.
  • Rnd 12: Sl st to first ch-1 sp, starting in same ch-1 sp, *3 dc in next ch-1 sp, sk 2 sts; rep from * around, join with sl st to first dc.
  • Rep Rnds 11-12 until hat measures approximately 4.75” (6.5”, 8”, 8.75”)/12 cm (16.5 cm, 20.5 cm, 22.5 cm) from crown, finishing after Rnd 12.
  • Rnd 13: Ch 1, sc in first st and in each st around.

Decrease to brim

  • Rnd 14: Ch 1, starting in first st, *sc2togBL, scBL in next 6 sts; rep from * around, join with sl st to first sc. – 60 (72, 84, 96) sts
  • Rnd 15: Ch 1, starting in first st, *sc2togBL, scBL in next 5 sts; rep from * around, join with sl st to first sc. – 48 (60, 72, 84) sts
  • Rnd 16: Ch 1, starting in first st, *sc, ch 1, sk 1 st; rep from * around, join with sl st to first sc. Fasten off. – 24 sts + 24 ch-1 sp (30 sts + 30 ch-1 sp, 36 sts + 36 ch-1 sp, 42 sts + 42 ch-1 sp)

Finishing

  • With yarn needle, weave in ends.
© 2018 by Marie Segares (Underground Crafter). This pattern is for personal use only. You may use the pattern to make unlimited items for yourself, for charity, or to give as gifts. You may sell items you personally make by hand from this pattern. Do not violate Marie’s copyright by distributing this pattern or the photos in any form, including but not limited to scanning, photocopying, emailing, or posting on a website or internet discussion group. If you want to share the pattern, point your friends to this link: http://undergroundcrafter.com/blog/2018/02/14/crochet-pattern-flattened-shell-hat-in-4-sizes. Thanks for supporting indie designers!

If you make your own Flattened Shell Hat, I’d love to see it! Share your progress and questions by tagging me on Facebook as @Underground Crafter, Instragram as @ucrafter, or Twitter as @ucrafter. You can also share a picture in the Underground Crafters Facebook group. Sign up for my weekly newsletter and get a coupon code for your choice of one of my premium patterns and other subscriber goodies. Plus, you’ll never miss one of my free patterns again!

Add the Flattened Shell Hat to your Ravelry favorites or queue.

Underground Crafter on RavelryIf you want an easy print format, you can buy an ad-free PDF version on Craftsy.

Underground Crafter on Craftsy

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