Ring Size Calculator
01. Calibration
Hold a standard credit card VERTICALLY against the screen. Adjust the slider until the dashed box matches the card edges exactly.
02. Measure Ring
Place your ring on the screen. For the most accurate results, use a simple ring that sits flat against the glass. Adjust the slider until the circle matches the INTERNAL edge of your ring.
Note: This is an estimation tool. For a perfect fit, professional sizing is recommended.
Size chart (text version)
Can't use the on-screen tool? Measure the inside diameter of a ring that fits you, or wrap a strip of paper around your finger and measure its length (circumference), then find the closest row below. Need help? Email rbz@rbzjewelry.com or call +972-54-6909926.
| US / Canada | Europe | Diameter (mm) | Circumference (mm) |
|---|---|---|---|
| 3 | 44 | 14.1 | 44.2 |
| 3.5 | 45.5 | 14.5 | 45.5 |
| 4 | 47 | 14.9 | 46.8 |
| 4.5 | 48 | 15.3 | 48.0 |
| 5 | 49 | 15.7 | 49.3 |
| 5.5 | 50.5 | 16.1 | 50.6 |
| 6 | 52 | 16.5 | 51.9 |
| 6.5 | 53 | 16.9 | 53.1 |
| 7 | 54.5 | 17.3 | 54.4 |
| 7.5 | 55.5 | 17.7 | 55.7 |
| 8 | 57 | 18.1 | 57.0 |
| 8.5 | 58 | 18.5 | 58.3 |
| 9 | 59.5 | 19.0 | 59.5 |
| 9.5 | 61 | 19.4 | 60.8 |
| 10 | 62 | 19.8 | 62.1 |
| 10.5 | 63.5 | 20.2 | 63.4 |
| 11 | 64.5 | 20.6 | 64.6 |
| 11.5 | 66 | 21.0 | 65.9 |
| 12 | 67 | 21.4 | 67.2 |
| 12.5 | 68.5 | 21.8 | 68.5 |
| 13 | 69.5 | 22.2 | 69.7 |
I also recommend the free Ring Sizer by Jason Withers app for measuring on your phone:
Download for iPhone (App Store) (opens in a new tab) Download for Android (Google Play) (opens in a new tab)
