Fans of big knitting and crochet projects will love these giant birch wood crochet hook, from premium supplier KnitPro. Available in 20mm, 25mm, 30mm, and 35mm widths, their smooth finish allows for easy, effortless movement of yarn. All hooks come with grooves to avoid stitch slippage. They’re made of lightweight, strong natural birch wood. Warm to touch and gentle in the hand, they’re ideal hooks for everyone. They’re approximately between in length.