Using a ring you already own
Diameter- Select a ring that fits the exact finger you want to size.
- Measure the inside diameter in millimeters using a ruler or caliper.
- Match the measurement to the chart below.
NANIMERICA Ring Size Guide
Find your
perfect fit
Find your perfect fit with our universal sizing chart. Measure a ring you already own, or use a strip of paper, then match it to the chart below.
Between sizes?Choose the larger size.
Wide band?Wider bands normally fit more snug.
Can I exchange for another size?Orders placed Nov 1–30 can be exchanged until January 15, 2027 with our extended returns & exchanges.
01 — How to measure
Two ways to measure
Using a paper strip
Circumference- Cut a thin strip of paper about 5 mm wide.
- Wrap it snugly around your finger.
- Mark where the strip overlaps.
- Measure the length in millimeters, which is your circumference.
- Match it to the chart below.
Timing
Measure at the end of the day for the most accurate fit.
Temperature
Avoid measuring when your hands are cold.
In between
If you fall between sizes, choose the larger size.
02 — Universal size chart
NANIMERICA Universal Ring Size Chart
Conversion chart for US and Canada, UK, Europe, Australia, circumference and diameter.
| US / CA | UK / AU | EU | Circ.mm | Diametermm |
|---|---|---|---|---|
| 6 | L | 52 | 51.9 | 16.5 |
| 7 | N | 54 | 54.5 | 17.3 |
| 8 | P | 57 | 57.2 | 18.2 |
| 9 | R | 59 | 59.3 | 18.9 |
| 10 | T | 62 | 62.3 | 19.8 |
| 11 | V | 65 | 65.0 | 20.7 |
| 12 | X | 68 | 67.5 | 21.5 |
| 13 | Z | 70 | 70.2 | 22.3 |
| 14 | Z+2 | 72 | 72.3 | 23.0 |
Option A uses the diameter column. Option B uses the circumference column.
03 — How it fits
How your NANIMERICA pieces should fit
Wide bands
Wider bands normally fit more snug compared to slim bands. If you're between sizes on a wide band, go with the larger size.
Slim bands
Slim bands sit more loosely than wide bands of the same size, so your measured size is usually the right choice.
04 — Returns & exchanges
Exchange for another size
Orders placed Nov 1–30 can be exchanged until January 15, 2027 with our extended returns & exchanges. Still unsure of your size? Email us and we'll help you find it.
Found your size? Find your ring.
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