Rings are not currently available at Amra. You can still use this reference to compare U.S. ring sizes. Measure the finger you intend to wear a ring on, and check the measurements with a jeweler if you are unsure.
Start with a ring that fits
- Choose a round ring that fits the intended finger comfortably.
- Use a millimeter ruler to measure straight across its inside opening, from inner edge to inner edge. Do not include the metal band.
- Compare that inside diameter with the approximate reference below.
| U.S. size | Inside diameter (mm) |
|---|---|
| 5 | 15.7 |
| 6 | 16.5 |
| 7 | 17.3 |
| 8 | 18.1 |
| 9 | 18.9 |
| 10 | 19.8 |
These are approximate reference measurements, not a guarantee of fit or a list of available inventory. If your measurement falls between sizes or you are unsure, have a jeweler measure the intended finger before ordering.
Before adding to your cart
- Use the size options on the specific product page; sizes vary by design.
- Check your selected size again in the cart.
- For a gift, use a ring worn on the same finger and hand, or confirm the recipient’s size.
Explore our current necklaces, earrings and bracelets, or ask a sizing question.
Measurement reference: Tiffany & Co. ring-size guide. Amra Jewelers is not affiliated with Tiffany & Co.