Prime Era Ring RINGS L'ERA Jewellery Antique Ring Eras: A Guide to Styles Through the Decades RINGS L'ERA Jewellery Engagement Rings Page 3 Era Design. Rings youll actually want to wear Gym, work, date night theyre ready for it all; every day, everywhere. Made with stainless steel, these are waterproof, anti tarnish, and built to survive all your moves. No fading. No fuss. Just pure drip Available in sizes 6 to 11, so you can find your perfect fit. Ring Sizes Size 7 17 mm Size 8 18. 5 mm Size 9 19 mm Size 10 20 mm