Ifstar 11pcs 27cm Multi-color Single-head Aluminum Tunisian Crochet Hooks Knitting Needles in Different Sizes (2.0mm to 8.0mm) Material: durable aluminum alloy. Each hook length: about 27cm /10.6". Hook size: 11 different sizes, including 2.0mm, 2.5mm, 3.0mm, 3.5mm , 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 7.0mm, 8.0mm. Size is permanently marked on needles. Needles are anti-resistant to keep longevity.