Crochet Mermaid Tail Blanket Pattern

Dive into a world of enchantment with my mesmerizing crochet mermaid tail blanket pattern! Designed to fit three sizes—child, teen, and adult—this crochet blanket pattern offers the perfect opportunity to transform into a mythical sea creature.

Whether you’re dreaming of becoming a mermaid princess or simply want to add a touch of magic to your crochet repertoire, this free crochet pattern is sure to delight. The free crochet pattern is below.

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crochet mermaid tail

CROCHET PATTERN INFORMATION

Crochet Skill Level

The free crochet mermaid tail pattern is a beginner project. It uses basic stitches in simple stitches repeats. 

Crochet Project Materials

Crochet Gauge

8 rounds = 4 inches

11 stitches = 4 inches

Mermaid Tail Blanket Size Chart

SizeWidthTotal Length
Child16.5 inches54 inches
Teen17.5 inches58 inches
Adult18.5 inches62 inches
Crochet Mermaid Tail Blanket Size Chart

Crochet Pattern Notes

  • Work this free crochet mermaid tail pattern in the round from the bottom up.
  • Work the tail/blanket section of this great project first.
  • Add the tail fin once the tail/blanket section is complete.
  • If you are new to crochet, I have a a video tutorial for many basic stitches on my YouTube channel.
  • dc = double crochet stitches
  • hdc = half double crochet
  • sc = single crochet stitches
  • blo = back loop only
  • st = stitch
  • sts = stitches
  • sl st = slip stitch
  • ch = chain
  • ch sp = chain space
  • chs = chains
  • rnd = round
  • rnds = rounds
  • rem = remaining

Etsy Shop

Many of my easy crochet patterns are also available as ad-free PDF patterns in my Etsy Shop.

Related Crochet Patterns

If you like this crochet baby blanket pattern, you may also like my Llama blanket, Bunny Blanket, and Ocean Animals blanket free crochet blanket patterns.


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Teenage girl modeling a crochet mermaid tail blanket.

If you love this free crochet mermaid tail pattern, be sure to check out my other fun and free crochet blankets.

CROCHET MERMAID TAIL PATTERN INSTRUCTIONS

crochet mermaid tail

Tail Pattern

Rounds 1-27 are the same for all sizes.

Rnd 1: Magic Ring, ch 2, 6 dc, join. (6 stitches)

Rnd 2: Ch 2, 2 dc in each st, join. (12 stitches)

​Rnd 3: Ch 2, dc in each st, join. (12 stitches)

Rnd 4: Ch 2, *2 dc, dc in next st, repeat from * around, join. (18 stitches)

Rnd 5: Ch 2, dc in each st, join. (18 stitches)

Rnd 6: Ch 2, *2 dc, dc in next 2 sts, repeat from * around, join. (24 stitches)

Rnd 7: Ch 2, dc in each st, join. (24 stitches)

Rnd 8: Ch 2, *2 dc, dc in next 3 sts, repeat from * around, join. (30 stitches)

Rnd 9: Ch 2, dc in each st, join. (30 stitches)

Rnd 10: Ch 2, *2 dc, dc in next 4 sts, repeat from * around, join. (36 stitches)

Rnd 11: Ch 2, dc in each st, join. (36 stitches)

Rnd 12: Ch 2, *2 dc, dc in next 5 sts, repeat from * around, join. (42 stitches)

Rnd 13: Ch 2, dc in each st, join. (42 stitches)

Rnd 14: Ch 2, *2 dc, dc in next 6 sts, repeat from * around, join. (48 stitches)

Rnd 15: Ch 2, dc in each st, join. (48 stitches)

Rnd 16: Ch 2, *2 dc, dc in next 7 sts, repeat from * around, join. (54 stitches)

Rnd 17: Ch 2, dc in each st, join. (54 stitches)

Rnd 18: Ch 2, *2 dc, dc in next 8 sts, repeat from * around, join. (60 stitches)

Rnd 19: Ch 2, dc in each st, join. (60 stitches)

Rnd 20: Ch 2, *2 dc, dc in next 9 sts, repeat from * around, join. (66 stitches)

Rnd 21: Ch 2, dc in each st, join. (66 stitches)

Rnd 22: Ch 2, *2 dc, dc in next 10 sts, repeat from * around, join. (72 stitches)

Rnd 23: Ch 2, dc in each st, join. (72 stitches)

Rnd 24: Ch 2, *2 dc, dc in next 11 sts, repeat from * around, join. (78 stitches)

Rnd 25: Ch 2, dc in each st, join. (78 stitches)

Rnd 26: Ch 2, *2 dc, dc in next 12 sts, repeat from * around, join. (84 stitches)

Rnd 27: Ch 2, dc in each st, join. (84 stitches)

Continue for Child Size Mermaid Tail

Rnds 28-108: Ch 2, dc in each st, join. (84 stitches)

Fasten off and weave in your ends.

Continue for Teen Size Mermaid Tail

Rnd 28: Ch 2, *2 dc, dc in next 13 sts, repeat from * around, join. (90 stitches)

Rnds 29-116 : Ch 2, dc in each st, join. (90 stitches)

Fasten off and weave in your ends.

Continue for Adult Size Mermaid Tail

Rnd 28: Ch 2, *2 dc, dc in next 13 sts, repeat from * around, join. (90 stitches)

Rnd 29: Ch 2, dc in each st, join. (90 stitches)

Rnd 30: Ch 2, *2 dc, dc in next 14 sts, repeat from * around, join. (96 stitches)

Rnds 31-124: Ch 2, dc in each st, join. (96 stitches)

Fasten off and weave in your ends.

Fin Pattern

The fin pattern is the same for all sizes. 

Join your yarn between rounds 14 and 15.

crochet mermaid tail

Ch 1 and make a sc in the same space. Work towards the tip of the tail.  Sc in the side of each row and in the chain space between each row. 

Slip stitch in the point of the tail and mark with a stitch marker.

Continue to sc up the opposite side, ending between rows 14 & 15. (28 stitches on each side = 56 total stitches)

← Working away from the tail

​→ Working towards the tail

← Row 1: ch 58 (58 chains)

→ Row 2: hdc in the 3rd chain from the hook and in each rem ch, join with a sl st to the next stitch on the tail, turn (56 stitches)

← Row 3: ch 2, hdc blo to the second to last st, leave the last st unworked, turn

→ Row 4: sl st in the first st, hdc blo in the next st and in each rem st, join with a sl st to the next sc on the tail, turn

← All odd numbered rows (5-53) are working away from the tail: repeat row 3

→ All even numbered rows (6-54) are working back towards the tail: repeat row 4

​Rows 1- 54 will each decrease by one stitch.

Skip over the middle stitch at the tip of the tail. You should have marked it with a stitch marker.

← Row 55: ch 2, hdc blo to the second to last st, 2 hdc blo in the last st, turn

→ Row 56: 2 hdc blo in first st, hdc blo in each rem st, join with a sl st to the next sc on the tail, turn

← All odd numbered rows (57-105) are working away from the tail: repeat row 55

→ All even numbered rows (58-106) are working back towards the tail: repeat row 56

Rows 55- 106 will each increase by one stitch.

Fasten off and weave in your ends. 

crochet mermaid tail

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