This sterling silver ring is a functional knitting needle gauge that checks US needle sizes 0-8. You will get compliments on your sleek ring with its graduated holes, and amaze when you put it to use. The ring is 7mm wide and 1.5mm thick, a comfortable fit for most fingers. Each ring is made to order, please allow about 2 weeks for delivery. If you need a half or quarter size, please let me know when you place your order.