Ring Size Guide
Find Your Perfect Fit
At Impimo Jewels, we want your jewelry to fit as beautifully as it looks. Our standard ring sizes follow the Thai system (Circumference in mm), ranging from 48 to 70.
How to Measure
Method 1: Measure Your Finger
- Wrap a strip of paper comfortably around your finger.
- Mark the spot where the paper meets.
- Measure the length with a ruler (in millimeters). This is your Thai Ring Size (Circumference).
Method 2: Measure an Existing Ring
- Choose a ring that fits perfectly.
- Measure the inside diameter in millimeters.

Ring Size Conversion Chart
| Thai Size (mm) | US Size (Approx.) | Inside Diameter (mm) |
|---|---|---|
| 48 | 4.5 | 15.3 |
| 50 | 5.25 | 15.9 |
| 52 | 6 | 16.5 |
| 54 | 7 | 17.3 |
| 56 | 7.75 | 17.8 |
| 58 | 8.5 | 18.5 |
| 60 | 9 | 19.1 |
| 62 | 10 | 19.8 |
| 64 | 10.75 | 20.4 |
| 66 | 11.5 | 21.0 |
| 68 | 12.25 | 21.6 |
| 70 | 13 | 22.2 |
Tip: Fingers change size based on temperature. For the best result, measure at the end of the day when your hands are warm.