Worried about what size to order? Use this free app (click here for iOS and here for Google devices) to instantly find your size. And if the fit isn't perfect, we'll be happy to exchange it.

Sun's Out Sale! Enjoy 25% off glow rings, plus get a free Halo ring with your purchase (prices as marked; remember to add the Halo you would like to your cart. Halo discount is applied automatically at checkout.)

• Made with high-performance carbon fiber and our custom glow material
• Hours of glow time with each charge
• Easily charged with sunlight or a UV flashlight (included for free)
• Ultra-durable and unconditionally guaranteed
• Handcrafted in Brooklyn, New York

High-performance filament-wound carbon fiber is paired with a glowing interior that extends into a glow rim around the ring's exterior. The ring glows when charged with a UV light or sunlight. Each ring is handcrafted in our Brooklyn shop and is rechargeable for 10+ years. Width is 6.5mm.

Unconditionally Guaranteed: If your ring doesn't fit perfectly, we'll be happy to exchange it for the right size. And if any of our products don't meet your expectations in any way, we'll happily replace them or send you a full refund, whichever you prefer.