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.
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- Made with high-performance titanium 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
Cut from high-performance titanium with a glowing comfort-fit interior as well as a glowing exterior stripe, the Fibonacci ring is designed according to the Fibonacci sequence.
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.