Non Piercing Nipple jewelry Handmade in Sterling Silver Sold in Pair Size is adjustable and you may change it to the size of your nipples. It will be better if I make the required size before sending The standard diameter 9-10mm - 0.37inch ********* Rings do not require painful piercing of the nipples and it is enough to clamp them securely. The diameter of the ring can be increased or decreased by applying a small force to a specific size. *****************