1.Choose your finger We recommend wearing your Luna Ring on your index finger for the best performance and accuracy. If you'd prefer another, the middle and ring fingers can work as well.
2.Orient the ring correctly The sensor bumps inside your Luna Ring should be on the palm side of your finger. The ring should fit securely and comfortably around your finger's base.
3.Take the gap test Make a fist while wearing the sizing ring. If you see a gap between the top of your finger and the inside of the ring, try a smaller size.
4.Assess the fit Your fingers naturally expand and contract, so we recommend wearing your sizing ring for at least 24 hours to confirm the best fit.
5.Tell us your size Once you've found the perfect fit, scan the QR code below and update your order by confirming your Luna Ring size.
