The Easy Grip crochet hooks from Pony are available in many different sizes ranging from 2 to 7mm and each size has its own color assigned. These crochet hooks ensure you have a good and comfortable grip around the handle, Materials: Aluminum and plastic Sizes: 3.0 mm - 14 cm 3.5 mm - 14 cm 4.0 mm - 14 cm 4.5 mm - 14 cm 5.0 mm - 14 cm 5.5 mm - 14 cm 6.0 mm - 14 cm