I bought my fiancé this silicone ring by Proof from Amazon. Super cheap but has held up really well- he's a mechanic and wears it daily (he wanted to wear it as soon as it arrived, lol). I would definitely recommend them. He wears a 10.5 in comfort fit ring styles, bought a size 11 in the silicone ring and it's a teensy bit large but doesn't fall off or feel uncomfortable.