The back needed to accommodate your piercing will depend on what piercing you are trying to style. Earlobe piercings are easy, the back that comes with Grayling's flat backs is a 6mm length, 20gauge thickness and this is an industry standard size for earrings. If you are trying to fit a cartilage or nose piercing, 18gauge is the average thickness and the length will depend on your anatomy.
See the guide below and email our support team with any questions before your purchase! Support@graylingjewelry.com If you already know what size back you need, leave us a note in the gift note box at the cart screen on our website. Our shipping team will take care of it from there!