If you're all about the details than this is the bracelet for you. Perfect for reminding you of the circumference of your wrist, it's made from a 1/2" wide ruler but with comfortable rounded ends. It features the needlessly complex Imperial system of inches that many people in the US still struggle with comprehending.

But it's not just a ruler! From the designer:

[It's] an engineering scale, which is more than just a ruler. On the inch side, one can measure and convert 32nds, 64ths, 16ths, 20ths, 50ths, 10ths and 8ths. This bracelet is the result of years of research and development.

High grade stainless steel, 1/2" wide x 6" long (13mm x 15cm).