How it works
Finding your perfect fit is essential for precision tracking. Our sizing kit ensures your Endurance Ring fits flawlessly.
Order Sizing Kit1. Order your Sizing Kit
Order the €9.99 Sizing Kit with shipping included. While Founder spots remain, the paid order reserves your €129.00 ring price for 30 days.
2. Wear it for 24 Hours
Wear your sizing ring for at least a full day. Your fingers naturally change size throughout the day, so this ensures you find your true fit.
3. Apply the full purchase price
Once you know your size, order the ring with the same email address and your personal Sizing code. The full €9.99 is credited towards the ring price.
Find your perfect fit.
Your sizing kit includes 8 precision-molded dummy rings in sizes 6 through 13. Test your preferred size over a full 24-hour cycle before finalizing your real Endurance ring purchase.