Mad Hatter

A sport yarn, 100% Merino Wool, 344 yd (315 m) per 113 g ball.

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Use instead

Your pattern uses 10 balls of Mad Hatter.

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

Same length: 3,440 yd. The 12 closest of 48. Buy one extra ball to be safe.

Yarn	Fiber	You need	Shop
Superwash Sport Valley Yarns	100% Merino Wool	23 balls of 153 yd	Buy at LoveCrafts
Cobblestone Fibra Natura	100% superwash merino wool	6 balls of 612 yd
Galway Sport Plymouth Yarn	100% Wool	23 balls of 151 yd	Buy at Wool and Company
Misi Embroidery Wool Wooldreamers	100% Spanish Wool WEIGHT	115 balls of 30 yd	Buy at The Woolly Thistle
Vovó Sport Retrosaria	100% fine Portuguese wool Te	23 balls of 156 yd	Buy at The Woolly Thistle
Homeward Bound Sport Sock Circus Tonic Handmade	80% Australian SRS Merino W	12 balls of 295 yd	Buy at The Woolly Thistle
Torzal Malabrigo	100% Superwash Merino Wool	22 balls of 160 yd	Buy at Jimmy Beans Wool
220 Sport Cascade Yarns	100% Peruvian Highland Wool	21 balls of 164 yd	Buy at LoveCrafts
Fjallalopi Ístex	100% Icelandic Wool	21 balls of 164 yd	Buy at Jimmy Beans Wool
Woolcycle Sport Madelinetosh	100% Upcycled Superwash Wool	11 balls of 329 yd	Buy at Jimmy Beans Wool
Sport Nouveau La Bien Aimee	100% Non-Superwash Fine Merino Wool	11 balls of 328 yd	Buy at Wool and Company
Merino 150 Degrade Lang Yarns	100% Superwash Merino Wool	21 balls of 164 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.