Find Your Perfect Fit
Ring Ordering Guide
Our size chart follows US sizing standards, helping you find the precise inner diameter for your Nova Smart Ring. This allows you to make an informed choice and ensure a comfortable fit before receiving your ring.
| US Size | Inner Diameter | US Size | Inner Diameter | US Size | Inner Diameter |
|---|---|---|---|---|---|
| 6 | 16.51mm | 7 | 17.40mm | 8 | 18.20mm |
| US Size | Inner Diameter | US Size | Inner Diameter | US Size | Inner Diameter |
| 9 | 19.00mm | 10 | 19.90mm | 11 | 20.70mm |
| US Size | Inner Diameter | US Size | Inner Diameter | ||
| 12 | 21.50mm | 13 | 22.30mm |
| US Size | Inside Diameter |
|---|---|
| 6 | 16.51mm |
| 7 | 17.40mm |
| 8 | 18.20mm |
| 9 | 19.00mm |
| 10 | 19.90mm |
| 11 | 20.70mm |
| 12 | 21.50mm |
| 13 | 22.30mm |
Get a Free Sizing Kit
We want your Nova Ring to fit perfectly, that’s why we offer a free sizing kit.
Try on different sizes at home before confirming your best fit, so you can choose the one that feels just right.
Pro Tips for Sizing
• Test Different Fingers
We recommend wearing the Nova Ring on your index, middle, or ring finger—these offer the best accuracy for heart rate, HRV, and sleep tracking. Try the sizing kit on both hands to see which finger and hand give you the most secure, comfortable fit.
• When in Doubt, Size Up
Finger size changes throughout the day due to activity, hydration, and temperature. To avoid a too-tight fit, we suggest choosing the slightly larger size, especially on your smallest recommended finger. The ideal fit slides over the knuckle with a little resistance and stays in place. Give your hand a shake—if the ring slips off, try a smaller size. Wear the sizing ring for a day or two to be sure.
Still Unsure?
If you’re still undecided, feel free to reach out to our support team at support@novaring.com
— we’re happy to help you find the perfect size!