Selle Italia offers 6 size variations of saddles to suit the needs of a wide variety of cyclists.
- S size saddles are for riders with narrow intertrochanteric distance (pelvic width) and L size saddles are for riders with wide intertrochanteric distance.
- The number associated with the size corresponds to whether or not the saddle has a central hole. S1 and L1 saddles have no central hole, S2 and L2 saddles have a medium-sized central hole (Flow), and S3 and L3 saddles have a large central hole (Superflow). For the right fit, match pelvic flexibility and rotation to the appropriate number.
| Size | Intertrochanteric Distance | Pelvic Rotation | Saddles |
| S1 | Narrow | Low | - |
| S2 | Narrow | Average | Flow |
| S3 | Narrow | High | Flow & Superflow |
| L1 | Wide | Low | - |
| L2 | Wide | Average | Flow |
| L3 | Wide | High | Flow & Superflow |
Note: All measurements are provided by the manufacturer and may vary depending on how measurements are acquired.