addi Afghan/Tunisian crochet hooks are for those special projects and are available in 12" length only. Availabe in: 12" USA (2.00mm), B (2.50mm), C (3.00mm), E (3.50mm), F (4.00mm), G (4.50mm), and H (5.00mm). Sizes are listed in approximate US sizes -AND- exact metric sizes for your convenience. All addi knitting needles are manufactured to exact metric sizes. Please Note: Every addi product purchased from an Authorized addi Dealer comes with a Lifetime Warranty from any manufacturer"s defect.