Tinksky 12 Sizes Colorful Plastic Carpet Crochet Hooks Knitting Needles 3.5mm to 12.0mm with Cable Metric size is permanently marked on crochet hook. With adjoined plastic cable for maximum project flexibility. Material: durable hard plastic. Total length: about 1.2m (cable included). Crochet hook length: about 15cm. Can be used to woven carpets, sofa cushion, etc. 12 sizes plastic crochet hooks including 3.5mm, 4.0 mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm, 12.0mm.