Knit and felt Serenity for sizes XS (S, M, L, XL, XXL) with 10 (10, 11, 11, 13, 14) skeins of Cascade 220 Yarn (100% Peruvian Highland Merino Wool, 220yds/100g). Suggested needles are US 13 (9mm) Needles. You will need 6 Buttons. Skill level is intermediate.