Determining Needle Size for Yarns

To determine a needle size for a yarn (homespun or unlabeled), double the yarn and, using a needle sizer, find the hole where your doubled yarn goes through comfortably; touching all sides but not squeezed. Use this as the primary needle size and compare to the pattern recommendations. For mohair, boucle, and novelty yarn, consider the fuzz/loop as part of the yarn width. For thick and thin, combine the fattest and thinnest parts to do your measuring.