Resources
Ring Size
Guide
Measure at home or visit the atelier for a professional fitting. An accurate size is the foundation of a comfortable piece.
How to Measure
Two Methods at Home
Either method gives a reliable result. For the most precise sizing, we recommend a professional mandrel fitting at any jeweler — or visit us in Los Angeles.
01
String or Paper Strip
- Cut a strip of paper about 6mm wide and 10cm long — or use a thin piece of string.
- Wrap it snugly around the base of the finger you intend to wear the ring on. Snug, not tight.
- Mark where the paper or string overlaps with a pen.
- Lay the strip flat and measure the length in millimeters from the end to your mark. This is your circumference.
- Divide by π (3.14159) to get your inside diameter in mm, then match to the table below.
Tip: measure in the evening — fingers are slightly larger later in the day. If in doubt, size up half a size.
02
Existing Ring
- Find a ring that fits the intended finger well.
- Place it on a ruler and measure the inside diameter — the distance across the inside of the band — in millimeters.
- Match the measurement to the table below.
Tip: if your measurement falls between two sizes, choose the larger one for comfort bands and the smaller one for narrow bands.
Size Conversion
US ring sizes with their corresponding inside diameter in millimeters.
| US Size | Inside Diameter (mm) | Inside Circumference (mm) |
|---|---|---|
| 4 | 14.9 mm | 46.8 mm |
| 4.5 | 15.3 mm | 48.1 mm |
| 5 | 15.7 mm | 49.3 mm |
| 5.5 | 16.1 mm | 50.6 mm |
| 6 | 16.5 mm | 51.8 mm |
| 6.5 | 16.9 mm | 53.1 mm |
| 7 | 17.3 mm | 54.3 mm |
| 7.5 | 17.7 mm | 55.6 mm |
| 8 | 18.2 mm | 57.2 mm |
| 8.5 | 18.6 mm | 58.4 mm |
| 9 | 19.0 mm | 59.7 mm |
| 9.5 | 19.4 mm | 60.9 mm |
| 10 | 19.8 mm | 62.2 mm |
| 10.5 | 20.2 mm | 63.5 mm |
| 11 | 20.6 mm | 64.7 mm |
| 11.5 | 21.0 mm | 66.0 mm |
| 12 | 21.4 mm | 67.2 mm |
Before You Order
- Ring size can vary by up to half a size depending on temperature, time of day, and hydration. Always measure at body temperature.
- Wide bands (over 6mm) fit tighter than narrow bands of the same nominal size. Size up half a size for wide-band pieces like Bez Ambar eternity bands.
- Knuckle size and finger tip size can differ. Measure the largest point the ring must pass over — the knuckle — and confirm the ring isn’t too loose at the base.
- Every Bez Ambar piece can be resized after purchase. Contact the atelier to arrange a sizing appointment.
Not Sure? Come In.
Professional Fitting at the Atelier
A mandrel fitting takes under five minutes and gives you an exact size. Visit us at 611 Wilshire Blvd, Los Angeles — by appointment.