Sinch Step-Through comes in one size and fits most adults from 4'11" to 6'3".
| Frame Size | Measurements |
| Height | 4'11" - 6'3" |
| Top Tube Length | 668mm |
| Reach | 483mm |
| Head Tube Length | 165mm |
| Standover Height | 390mm |
| Wheelbase | 1130mm |
| Min Saddle Height | 850mm |
| Max Saddle Height | 1018mm |