Our ring sizer is an easy and reliable tool to help you determine your perfect ring size in a second.Think of our ring sizer as a little belt. Push the end through the opening to form a ring shape. Slip your finger through the loop and adjust to give a comfortable fit. Make sure that you are able to slip it over the knuckle of your finger – it's okay to feel a little resistance here. Simply read off the indicated size next to the little black arrow. And that's all there is to it.Free for #TheDiamondClub members, discount is applied automatically at the check-out, just be sure to be logged into your account.