Measure Your Child
We size all our bikes using inside leg length (inseam) rather than relying on age as the determining factor.
This approach is considered the most dependable method for selecting the ideal bike size for a child. Although age and height can provide approximate guidance, they are not as reliable because there is a significant variation in leg length and height among children of the same age.
We recommend taking a bit of time to measure the riders inside leg - it’s really easy to do:
Taking the inseam measurement:
- Stand the child barefoot (or in socks) against a wall
- Measure from the floor to their groin as high as is comfortable for the child
Alternate method using a book:
- Stand the child barefoot (or in socks) against a wall
- Place a small book between their legs, as high as is comfortable and against their groin
- Ask the child to move away and measure between the top of the book and the floor.
Once you have measured their inside leg, use the table below to find the right size of bike for your child. There is no need to add or subtract centimetres to your child's measurement. Follow the process and your child will have a correctly sized bike.
See our guide: Which Balance Bike should you choose?
Inside Leg | Model | Age | Wheel Size |
23 to 30cm | Frog Tadpole Mini | 1 - 2 | 10" |
30 to 36cm | Squish Balance Bike | 2 - 3 | 12" |
31 to 35cm | Frog Tadpole Balance Bike | 2 - 3 | 12" |
33 to 42cm | Specialized Hotwalk | 2 - 4 | 12" |
Which First Pedal Bike should you choose?
Inside Leg | Model | Age | Wheel Size |
36 to 41cm | Frog 40 | 3 - 4 | 14" |
40 to 46cm | Squish 14 | 3 - 5 | 14" |
40 to 50cm | Frog 44 | 4 - 5 | 16" |
43 to 48cm | Forme Cubley 14 | 3 - 5 | 14" |
45 to 56cm | Frog 47 | 4 - 6 | 18" |
47 to 50cm | Squish 16 | 4 - 6 | 16" |
49 to 63cm | Woom 3 | 4 - 6 | 16" |
50 to 53cm | Squish 18 | 4 - 6 | 18" |
50 to 54cm | Forme Cubley 18 | 5 - 6 | 18" |
Which Hybrid Bike should you choose?
52 to 60cm | Frog 53 | 5 - 8 | 20" |
52 to 62cm | Forme Kinder 20 | 5 - 8 | 20" |
54 to 57cm | Squish 20 | 5 - 7 | 20" |
57 to 74cm | Frog 61 | 8 - 10 | 24" |
58 to 66cm | Frog 62 | 8 - 10 | 24" |
62 to 70cm | Frog 69 | 10 - 12 | 26" |
67 to 76cm | Frog 73 | 12 - 14 | 26" |
72cm + | Frog 78 | 13 + | 26" |
76cm + | Woom 6 | 12 + | 26" |
Inside Leg | Model | Age | Wheel Size |
56 to 65cm | Road 58 | 6 - 7 | 20" |
68 to 77cm | Road 70 | 11 - 14 | 26" |