This is a set of two ring gauge bands. You can wrap them around your finger to measure your ring size. I'm selling these because I bought too many. I didn't check carefully when I bought them, so I don't know if the sizes are Japanese or US. However, I think you can use these to help you choose a ring. Color: Black, gold lettering *There are listings A and B for ring gauge bands, but they are both the same (I've used letters to differentiate them).* *I have other items for sale too!* *I offer discounts for multiple purchases! Please contact me in the comments section before you buy!*