Yarn Sizes Explained

When you are just starting out with knitting or crochet one of the most confusing concepts to understand are yarn and thread sizes. Depending on where you are located, yarns and threads may be referred to by different names. There are even some yarns sizes that are the same size as crochet thread.

To help you understand how yarns are sized and some of the common uses for each size of yarn we have prepared the following yarn size chart.

Icon	Also Known As	Crochet Thread Size	Description
	Fingering	Size 10	Lace yarn is the same size as size 10 crochet thread. It is very thin and often used to make shawls, doilies, table runners, jewelry, bridal accessories, etc.
	Sock, Fingering, Baby	Size 3	Super fine yarn is lightweight and typically used for baby items, sock patterns, or shawls. Notice that superfine is the same size as size 3 crochet thread.
	Sport, Baby		Sport weight yarn can be used for items such as socks, wraps, heirloom sweaters, and other delicate accessories.
	Light Worsted, DK		Slightly heavier than sport weight yarn, this weight is used for items such as garments, apparel and heavier baby items.
	Worsted, Afgan, Arun		Worsted weight yarn is the most popular size yarn. It is easy to work with and ideal for working up afghans.
	Chunky, Craft, Rug		Bulky yarn is about twice as thick as worsted weight. It usually works up quickly when using large needles/hooks, and it’s great to use when making sweaters, scarves, rugs, and throws.
	Roving		Super bulky yarn is a thick yarn that is very easy to work with. It is most commonly used for cowls, scarves, and hats.
	Roving		Jumbo yarn is the thickest yarn weight, added in 2014 to classify the super thick yarns that began to appear on the market. Jumbo yarns are great for arm knitting and work up quickly.

As you can see Lace (Size 0) and Super Fine (Size 1) can both be referred to as Fingering size. Super Fine (Size 1) and Fine (Size 2) can both be referred to as baby.

Also of interest is that Lace (Size 0) is the same as size 10 crochet thread and Super Fine (Size 1) is the same size as size 3 crochet thread.

Having a chart like this one as a ready reference helps clarify the terminology associated with yarn sizes and provides a guide for picking the yarn or thread for your next project.