Materials: J. & P. Coats or Clark’s thread, size 30: 1 ball steel crochet hook, No. 10 or 11 Size: Approximately 7-1/2 inches (19 cm) in diameter. Publications: Book No. 201, Doilies, The Spool Cotton Company, 1943. Book No. 201, Doilies, The Canadian Spool Cotton Company, 1944.