Opus is a tote with music notes and symbols. Yarn does NOT work for this. Crocheted in the round or rectangular it is seamless. Constructed with Hilos #9 La Espiga from “creativeyarnsource.com” and a Boye steel crochet hook sized 0/D(for a bag 10 1/2w x13 1/2h). You will need 2 skeins of white(main color) and 1 black(contrasting color). The pattern is worked in front post single crochet. Size varies depending on the size of the hook and Hilos Omega.