Crochet hooks from 0.6mm to 15mm. Up to 1.75mm are 12cm in length. 4mm and up are 15cm in length. Up to 1.75mm are metal, 2mm to 5mm aluminium and above 5mm plastic. Brands may vary. Plus sets of plastic rainbow crochets hooks with sizes from 5mm to 10cmin and the Addi Swing crochet hook range, which are ergonomically designed to help prevent stiffness and cramping with premium quality 16cm Addi Turbo crochet hooks