If you don't know your ring size, but are dreaming about owning a Beryllina ring, just order one of these handy dandy reusable ring sizers! Carefully designed like a zip tie with sizing measurements on the top, this sizer can measure whole and half sizes from 1 to 17. But unlike a normal zip tie that you can only pull tight once and then it's stuck forever, this ring sizer can be moved back and forth until you find your perfect size. You can use it as many times as you like for all of your fingers! Made in the UK.Free shipping in the US!