Frog Sizing Guide
| Minimum inside leg (cm) | Approx age | Wheel Size | Frame Size | |
| Tadpole | 32 | 2-3 | 12" | 4" |
| Tadpole Plus | 38 | 3-4 | 14" | |
| Frog 43 | 43 | 3-4 | 14" | 9" |
| Frog 48 | 48 | 4-5 | 16" | 9.5" |
| Frog 52 | 52 | 5-6 | 20" | 10" |
| Frog 55 | 55 | 6-7 | 20" | 11" |
| Frog 62 | 62 | 8-10 | 24" | 12" |
| Frog 69 | 69 | 10-12 | 26" | 14" |
| Frog 73 | 73 | 12-14 | 26" | 16" |
| Frog Road/Track 58 | 58 | 6-7 | 20" | 11" |
| Frog Road/Track 67 | 67 | 8-12 | 24" | 14" |
| Frog Road/Track 70 | 70 | 11-14 | 26" | 17" |
Of course all children have different length arms and torsos too, so to ensure a comfortable riding position, the handlebar height can be tailored, and saddles can be slid backwards and forwards on their rails. (These adjustments are easy to do and just need an allen key; instructions are in the manual).
