We make these rings by hand in Michigan using 960 Argentium Sterling Silver. This fine silver provides superior oxidization resistance, scratch resistance, a composition that is lead, nickel and copper free, along with a great balance of durability and flexibility. Argentium silver provides a brighter, whiter appearance versus traditional Sterling Silver. The upper and lower peninsula rings are created separate allowing you to choose to wear only the upper peninsula, lower peninsula, or both together! We designed this specifically to minimize snagging, stack together and fit comfortably. Available in sizes 5-11. (Note that these rings are handmade, please allow up to 1/4 variance in sizing.)