The twist angle gauge for yarn spinning tells the angle of twist from 0-90 in increments of 10 degrees and designates S or Z twist. To measure twist angle, lay your yarn across the wood and match the twist to the closest twist angle line. The wraps per inch (WPI) is a way to measure the thickness of a yarn. This guide also has lines on the back to measure your yarn against, including lace, fingering, sport, DK, worsted, bulky and super bulky. This yarn guide measures about 3 inches tall by (almost) 3 inches wide and comes with a brass clasp to hang on your knitting bag.
