The Wrist Ruler is a leather bracelet with engraved inch and centimeter measurements. If you find yourself always needing to measure things when youâ€™re on the go, this is the perfect product for you! Packaged in a metal tin. Sizes are based on wrapping around your wrist twice. Give it extra length depending on how loosely you want to wear it. Please allow an extra 1/2 inch for the stud closure. Wrist Ruler is made in the US.