Boye has been a trusted brand since 1906 and is now recognized as a premier supplier of crochet hooks knitting needles looms and other accessories for those who love to work with yarn. This set of steel and aluminum crochet hooks comes in a convenient carrying case zippered on three sides to lay open flat. Set contains 16 steel hooks and 8 aluminum hooks. Steel sizes (US): 00 (3.5mm) 0 (3.25mm) 1 (2.75mm) 2 (2.5mm) 3 (2.1mm) 4 (2mm) 5 (1.9mm) 6 (1.8mm) 7 (1.65mm) 8 (1.5mm) 9 (1.4mm) 10 (1.3mm) 11 (1.1mm) 12 (1mm) 13 (0.85mm) and 14 (0.75mm). Aluminum sizes (US): D (3.25mm) E (3.5mm) F (3.75mm) G (4.25mm) H (5mm) I (5.25mm) J (5.75mm) K (6.5mm). Sizes are marked on each hook for easy identification. Case measures approximately 7 x 5 x 0.875 and is made of durable canvas. Whether you re a novice or an experienced crocheter this versatile assortment of hooks will allow you to make a wide range of creative projects. Featuring high-grade lightweight construction the hooks feature rounded heads to prevent snagging and splitting.