This is a classic ripple-chevron design using shell/fan stitches. The pattern below recreates the look from your image in a beginner-friendly way.

Materials

• Worsted weight yarn (multiple colors optional)
• Crochet hook: 5 mm (H/8)
• Scissors
• Yarn needle

Abbreviations

• ch = chain
• sc = single crochet
• dc = double crochet
• sk = skip
• st = stitch
• rep = repeat
• shell = 5 dc in same stitch

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Foundation Chain

Chain in multiples of 14 + 3

Example:

• Small swatch: 31 chains
• Baby blanket: 143 chains
• Throw blanket: 171 chains

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Row 1

1. Dc in 4th ch from hook.
2. Dc in next 4 ch.
3. (Dc3tog over next 3 ch) → valley decrease.
4. Dc in next 5 ch.
5. 3 dc in next ch → peak increase.
6. Dc in next 5 ch.

Repeat steps 3–6 across row.

Turn.

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Row 2

Ch 3 (counts as dc).

1. Dc in next 4 sts.
2. Dc3tog over next 3 sts.
3. Dc in next 5 sts.
4. 3 dc in next st.
5. Dc in next 5 sts.

Repeat across.

Turn.

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Fan Ripple Texture Row

Ch 3.

1. Work shell (5 dc) in center peak stitch.
2. Skip 2 sts.
3. Sc in next st.
4. Skip 2 sts.
5. Shell in next st.

Continue across, placing:

• shells on peaks,
• sc near valleys.

Turn.

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Repeat Pattern

Alternate:

• 2 ripple rows
• 1 fan/shell texture row

Repeat until desired length.

PDF DOWNLOAD FREE: Vintage Fan Ripple Stitch 

Color Changes

For the rainbow effect:

• Change color every 2 rows
• Fasten off previous yarn
• Join new color at row edge

Suggested palette:

• Pink
• Lavender
• Sky blue
• Mint green
• Soft yellow
• Orange

Tips

• Keep tension loose for soft waves.
• Blocking helps define the ripple shape.
• Cotton yarn gives sharper stitch definition; acrylic gives softer drape.

 

VIDEO TUTORIAL: