Crochet Mermaid Tail Blanket Pattern for Beginners

I’m thrilled to share my new Crochet Mermaid Tail Blanket Pattern with you! This pattern is designed for three sizes: child, teen, and adult. It’s perfect for anyone who dreams of being a mermaid. So grab your yarn and hooks, and let’s start creating this enchanting blanket together! The free crochet pattern is below.

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Free Crochet Mermaid Tail Blanket Pattern

The blanket is cozy and fun, making it great for snuggling up while reading or watching TV. Whether you’re making it for yourself or as a gift, this mermaid tail blanket will bring a touch of magic to your crochet projects.

Materials Needed

• Crochet Hook Size: M/N-13 9 mm
• Yarn: Worsted weight yarn. I used 4 skeins (7 oz/198 g) or Red Heart Super Saver in the color Flamingo.
• Yarn needle: Use this to weave in your ends.
• Scissors: Use scissors to fasten off your yarn.
• Stitch marker(s): Optional. Use these to help keep track of your stitches. 

PDF Version

View this pattern in my Etsy Shop: crochet mermaid tail blanket pattern

Crochet Mermaid Tail Blanket Pattern

Skill Level

Advanced beginner. This pattern uses basic crochet stitches with some shaping.

Finished Sizes

Size	Width	Total Length
Child	16.5 inches	54 inches
Teen	17.5 inches	58 inches
Adult	18.5 inches	62 inches

Gauge

11 stitches & 8 rounds = 4 inches

Crochet Terms

• dc = double crochet stitches
• hdc = half double crochet
• blo = back loop only
• ch/chs = chain/chains
• ch sp = chain space
• st/sts = stitch/stitches
• sl st = slip stitch
• rnd/rnds = round/rounds
• rem = remaining

Pattern Notes

• The pattern is worked in the round from the bottom up.
• You will make the tail section first and then add the fin.
• Repeat instructions between the asterisks (*) for the rest of the round.
• The pattern is written in US terms.

Crochet Mermaid Tail Blanket Pattern Instructions

Tail Instructions

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)

Child Size Crochet Mermaid Tail Blanket Pattern

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

Fasten off and weave in your ends.

Teen Size Crochet Mermaid Tail Blanket Pattern

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.

Adult Size Crochet Mermaid Tail Blanket Pattern

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 Instructions

The fin pattern is the same for all sizes. 

Join your yarn between rounds 14 and 15.

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.

Finishing Your Crochet Mermaid Tail Blanket Pattern

Fasten off and weave in your ends. 

Looking for more Free Crochet Patterns?

You may also like my monstera leaf blanket, unicorn blanket, llama blanket, and ocean animals blanket.

Let’s Connect!

I’d love to hear from you. You can find me on social media- Instagram, Facebook, Pinterest, and my YouTube channel. Until then, happy crocheting!