Ring Sizer

Guessing your ring size is how rings end up living in drawers.

This little sizer takes the guessing out. It works like a tiny belt: slip it on, pull until it sits snug, then slide it back over your knuckle. If it comes off with a little resistance, that's your size. Read the number at the arrow and you're done.

It's marked in full and half US sizes, so you can tell a 6 from a 6.5, which matters more than you'd think. The plastic is light, smooth and reusable, so measure as often as you like: in the morning and in the evening (fingers change through the day), on both hands, or on a friend whose ring you're secretly buying.

It costs less than a coffee and saves you the hassle of a return. Order it before your ring, and the ring will fit the first time.