Red Heart Classic Crochet Thread. The perfect crochet cotton for bedspreads table cloths doilies apparel and accessories. Size: 10. Made of 100% Mercerized Cotton. Put up: 350yd/320m. Recommended Steel Crochet Hook US 7 (1.5mm). Care: Machine wash gentle no bleach rinse well and remove promptly roll in towel and block. No dye lot.