Aunt Lydia's Crochet Thread Size 10 -Jumbo Bulk Crochet Cotton. Truly an economy put-up, over 1.5 miles of crochet cotton! Use on bedspreads, table cloths, doilies, apparel, accessories and more. Content: 100% mercerized cotton. 2730yd/2495m on 7/1.5mm crochet hook. Care: machine wash gentle cycle, warm water, no bleach, rinse well and promptly remove, roll in towel and block. Imported.