Method 1
1. Stand in front of the mirror.
2. Hold the ruler horizontally below your eyes.
3. Measure the distance between the left temple and right temple.
4. Record the distance in millimeters.
5. Use your temple-to-temple width to find the total width of your glasses. For example, if your temple-to-temple width is 155mm, then you should look for apair of glasses with a width in the 155mm-160mm.
lf it is not convenient for you to do it yourself, you can also ask your family or friends to help you.

Method 2
Check the size of your current suitable frame. In the majority of cases, you'll find a series of numbers that indicates your frame sizeand looks like this: 58口22-150. These numbers mean:
- 58mm: lens width
- 22mm: bridge width
- 150mm: temple length
Once you check these dimensions, compare them with the dimensions of the specs you just picked. lf they're similar, go ahead! lt should be the right fit for you.

Method 3
Please refer to SIZEGLASSES official dimensions
| Size | Frame Width | Face Wide Range |
| L | 140-145MM | 135-140MM |
| XL | 145-150MM | 140-145MM |
| 2XL | 150-155MM | 145-150MM |
| 3XL | 155-160MM | 150-155MM |
| 4XL | 160-165MM | 155-160MM |
| 5XL | ≥165MM | ≥160MM |