A plastic ring sizing gauge that measures US ring sizes 1 to 17, including half sizes. It works like a belt - push the pointed end through the buckle, slip it onto your finger, adjust until it sits comfortably, and read your size at the arrow. Reusable and comes with instructions.
If you're ordering a ring online and don't know your size, this is an easy way to find out. A local jeweller can size your finger for free, but if that's not convenient, this ring sizer tool lets you do it at home.
