Ray-Ban RB2140 901/32 Original Wayfarer
Two methods to know the size:
| Finger measure | Size |
| 48 mm | 48 |
| 50 mm | 50 |
| 52 mm | 52 |
| 54 mm | 54 |
| 56 mm | 56 |
| 58 mm | 58 |
| 60 mm | 60 |
| 62 mm | 62 |
| 64 mm | 64 |
| Ring diameter | Size |
| 15,28 mm | 48 |
| 15,92 mm | 50 |
| 16,56 mm | 52 |
| 17,20 mm | 54 |
| 17,83 mm | 56 |
| 18,46 mm | 58 |
| 19,10 mm | 60 |
| 19,74 mm | 62 |
| 20,38 mm | 64 |
