Coats Crochet Extra Fine Crochet Thread, 30, White 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 30 100Percent mercerized cotton 500 yds./457M Solids: 150 yards shaded: 100 yards 100Percent mercerized cotton