Coats Crochet Fine Crochet Thread, 20, Natural Aunt Lydia has been America's favorite brand for over 100 years High luster mercerized cotton thread Aunt Lydia's Classic Crochet Thread is perfect for delicate crochet projects both large and small Features: size 20 100% mercerized cotton 400 yds Solids:150 yards Shaded: 100 yards 100% Mercerized Cotton