The addi Art Diamond is a 32" US 15 circular needle. This once in a lifetime creation features a visible core of genuine Swarovski crystals which twinkle and dance in celebration of every stitch you knit. 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.