Generic 9Pcs 15CM Plastic Crochet Hooks Perfectly round sharp point for a smooth knitting right from the start Single Pointed knitting needles feel smooth in your hands. These knitting needles are supplied with wide sizes ranging from 3mm to 12mm, which will fulfill your varied knitting needs. Material:Plastic. Length:15cm. This is a set of 9 differently sized needles:. 3.0MM 4.0MM 5.0MM 6.0MM 7.0MM 8.0MM 9.0MM 10.0MM 12.0MM.