Design No 7076 Woman's 3/4 or Short Sleeved Crochet Tunic. Sirdar Cotton DK is a cool and elegant, machine washable summer yarn. The subtle sheen gives crisp stitch definition making Sirdar Cotton perfect for crochet. You will also need: 4.5mm(UK7 - USG/6) Crochet Hook and 1 5.50 (UK5 US I/9) Crochet Hook.