True weight is Fingering, but works better when used with Sport gauge. Held double, it can work for Worsted patterns.
Omega’s La Espiga nylon #18, is 7 oz. per roll, 197 yards, and comes in 86 colors. Recommended hook E/F. Compares to Cotton #5, JP Coats Nylon, Linen #3
Compares to No. 5 crochet cotton.