Mosaic

A super bulky yarn, 95% Merino Wool (mulesing-free), 5% Nylon, 153 yd (140 m) per 100 g ball.

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Weight	Super Bulky, 6
Length per ball	153 yd · 140 m
Ball weight	100 g
Length per 100 g	153 yd · 140 m
Fiber	95% Merino Wool (mulesing-free), 5% Nylon
Source	woolandcompany.com

Use instead

Your pattern uses 10 balls of Mosaic.

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

Same length: 1,530 yd. Buy one extra ball to be safe.

Yarn	Fiber	You need	Shop
ASAP Madelinetosh	100% Superwash Merino wool	17 balls of 90 yd	Buy at Jimmy Beans Wool
Trust Wooladdicts	55% Superfine Alpaca, 45% Extrafine Merino Wool	19 balls of 82 yd	Buy at Wool and Company
Paloma Debbie Bliss	60% Baby Alpaca, 40% Merino Wool	22 balls of 71 yd	Buy at LoveCrafts
Malou Lang Yarns	70% Baby Alpaca, 20% Nylon, 10% Wool	22 balls of 71 yd	Buy at Wool and Company
Apricity Hobbii X TL Yarn Crafts	65% Alpaca, 28% Polyamide, 7% Wool	20 balls of 77 yd	Buy at Hobbii

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.