Free Pattern – Tesseract

Blocks of alternating textures twist around this fun to make hat, capped off with a spiral design. Available in 6 sizes, so you can make one for the whole family. The entire hat is made in only half double crochets, for extra squishiness. Varying textures, created by working the stitches in different loops, keep it interesting and fun. Change colors as you go to create your own unique look and to use up scraps!

Tesseract - a free crochet pattern on Stitches n Scraps

I designed Tesseract for the 2018 CGOA Chapter Challenge. Chapters around the country are competing to make sets of chemo hats to donate. The solid design and soft feel of this hat make it a great choice for charity projects!

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  • 40 – 125 yds worsted weight yarn
  • Size H / 5 mm hook, or size needed to obtain gauge
  • Yarn needle
  • Stitch markers (optional)


Skill Level:

Easy- all hdc stitches worked in various loops. Hdc2tog decrease.


Preemie [0-6mo, 6-12 mo, child, adult small, adult large]. Circumference:  11.5 [14, 16, 18.5, 21, 23] inches. Height: 5 [6, 7, 7.75, 8.5, 9] inches.


14 hdc x 11.5 rows = 4″

Abbreviations used:

(Pattern is written in US terms)

  • ch = chain
  • hdc = half double crochet
  • hdc2tog = half double croceht 2 stitches together
  • sl st = slip stitch
  • st(s) = stitch(es)
  • rnd = round
  • RS = right side
  • WS = wrong side

Recommended Resources:


Note: Feel free to change colors as desired throughout the pattern. For the most seamless color changes, change colors when you are working into a back loop or third loop.

Striped hat - Tesseract - a free crochet pattern on Stitches n Scraps


Ch 5 [6, 7, 7, 8, 8]

Row 1 (RS): Hdc in 2nd ch from hook and in each ch across. (4 [5, 6, 6, 7, 7] hdc)

Rows 2-26 [30, 34, 40, 44, 50]: Ch 1, turn, hdc in back loop only of each st across.

Joining Row (WS): Fold work in half so that short ends meet, with right sides together. Working through last row and bottom of first row together, sl st in each st across.

Joining - Tesseract - a free crochet pattern on StitchesnScraps


Turn work so that right side is facing.

Note: This section is worked in continuous rounds. Do not join, turn, or chain at the start of rounds. Stitches will naturally shift slightly with every round. You may find it helpful to mark the first stitch of each round.

Rnd 1: Working in sides of rows, work 40 [48, 56, 64, 72, 80] hdc evenly around.

Rnds 2-6 [8, 9, 10, 10, 11]: (Hdc in third loop of next 5 [6, 7, 8, 9, 10] sts, hdc (normally) in next 5 [6, 7, 8, 9, 10] sts) 8 times.

Third loop - Tesseract - a free crochet pattern on Stitches n Scraps


Start crown at Rnd 6 [5, 4, 3, 2, 1]

Rnd 1: (Hdc2tog, hdc in next 8 sts) 8 times. (72 sts)

Rnd 2: (Hdc2tog, hdc in next 7 sts) 8 times. (64 sts)

Rnd 3: (Hdc2tog, hdc in next 6 sts) 8 times. (56 sts)

Rnd 4: (Hdc2tog, hdc in next 5 sts) 8 times. (48 sts)

Rnd 5: (Hdc2tog, hdc in next 4 sts) 8 times. (40 sts)

Rnd 6: (Hdc2tog, hdc in next 3 sts) 8 times. (32 sts)

Rnd 7: (Hdc2tog, hdc in next 2 sts) 8 times. (24 sts)

Rnd 8: (Hdc2tog, hdc in next st) 8 times. (16 sts)

Rnd 9: Hdc2tog around, fasten off, leaving a 6-8 inch tail.  (8 sts)

Sew ending tail through last 8 stitches and pull tightly to close top. Weave in all ends.


I hope you enjoy making this pattern. A downloadable pdf of this pattern is also available in my Craftsy store or on Ravelry, for a small fee. The fee for the pdf format is to offset the advertising revenue lost when you print or download the pattern rather than viewing it online.

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  • Elise

    I’ve gotten stuck on round 1 of the hat (size small adult). I can’t seem to fit 72 hdc stitches on the boarder and was wondering if you had any suggestions for fitting those last few stitches in. I’ve only managed to fit 66 out of the required 72 hdc stitches.
    I have 44 rows of 7 hdc each and I can’t figure out where I went wrong. Any suggestions would be much appreciated. I know it’s hard to try and fix a problem you can’t see when it comes to crochet.

    • Pia Thadani

      Hi Elise! 🙂 It’s purposely more stitches than would make it even..that’s what makes the ribbing section cinch in. 72 stitches is 8 * 9, so what I do is use stitch markers to divide up the edge into 8 manageable sections, then work 9 stitches in each section. Check out the tutorial on working evenly around (linked in the recommended resources section). You may find that helps.

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