Red Heart Fashion Crochet Thread. The perfect crochet cotton for home decor, apparel, and accessories. Size: 5. Made of 93% Mercerized Cotton/ 7% Metallic. Put up: 100yd/91m. 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.