Hang out poolside with a crocheted sun bikini and accessories, including slippers, a tote bag, cover-up and more. Easy-to-follow instructions will help you create these vintage inspired pieces and make a splash this summer. Projects call for size 4 worsted weight yarn and crochet hook US size E, 3.5mm, F, 3.75mm, G, 4mm, H, 5mm, I, 5.5mm. Easy skill level.