Worm

A bulky yarn, 100% Merino Wool, 131 yd (120 m) per 150 g ball.

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Use instead

Your pattern uses 10 balls of Worm.

Same weight and fiber family, and close in length per 100 g. Closest first.

Same length: 1,310 yd. Buy one extra ball to be safe.

Yarn	Fiber	You need	Shop
Yana Amano	100% Fine Highland Wool	8 balls of 175 yd	Buy at Wool and Company
Yana Journeys Amano	100% Fine Highland Wool	8 balls of 175 yd	Buy at Wool and Company
Maximo Pascuali	100% GOTS Certified Organic Extra Fine Merino Wool	16 balls of 87 yd	Buy at Wool and Company
Lil' Crazy Sexy Wool Wool and the Gang	100% Wool	16 balls of 87 yd	Buy at Wool and Company
Bulky Merino Koigu	100% Merino Wool	15 balls of 93 yd	Buy at Wool and Company
Yarn Velvet Island	100% Superwash Merino Wool	14 balls of 100 yd	Buy at Wool and Company
Home Madelinetosh	100% Superwash Merino Wool	12 balls of 110 yd	Buy at Wool and Company
Tosh Chunky Madelinetosh	100% Superwash Merino Wool	8 balls of 165 yd	Buy at Wool and Company
Filati Country Le Fantasie Ornaghi	50% Wool, 40% Alpaca, 10% Alpaca	14 balls of 95 yd	Buy at Wool and Company

Same weight: the weight number when the source gives one, or the brand's weight word (DK, Worsted) when it doesn't.
Length per 100 g within 10% of this yarn's, when both list a ball weight.
Gauge within 10%, when both list one.
Same fiber family: animal fibers (wool, alpaca, silk…), plant fibers (cotton, linen, viscose…) or synthetics (acrylic, nylon…), whichever this yarn has most of.
Closest first: still made before discontinued, then more fiber in common, then closer length per 100 g.
Among yarns that match just as closely, ones sold by our partner shops come first.

Knit a swatch before you start: a different fiber can change your gauge. To add a safety margin, use Skeins for a yarn swap.