Knit the Seaside Shell with Ruffle for sizes Small 33" (Medium 36", Large 40") with 438 (584, 730) yards of Heavy Worsted Weight Yarn. (Pictured in Queensland Pima Fresca (100% Cotton; 146yds/100g).) Suggested needles are US 10 (6mm) 24" or 29" Circular Needles. You will also need a G-6 (4mm) Crochet Hook.