Materials: This working compass ring is made out of 925 Sterling Silver. The compass is a working compass and the N spins to always face North. This ring is super comfortable and the compass is tightly soldered onto a 3.5mm band. The side of the ring is flat so it can be engraved. All silver components are 925 silver. Compass ring comes in whole sizes 5 thru 10. Please choose ring size from options above.