Kids Bike Size Guide

Inside leg measuremnt is the most reliable way of getting the right size of bike for your child. Age alone isn’t a reliable measure. It is always best to sit your child on the bike before purchasing, but where this is not possible we hope this guide helps.

Please take the time to measure the rider’s inside leg. It’s easy to measure:

  1. Stand the child in socks against a wall
  2. Place a small book between their legs, as high as is comfortable
  3. Ask the child to move away and measure from the top of the book to the floor, in cm.

Once you have measured the inside leg, use this table to find the right size of bike for your child. Note: The bike size may vary slightly by supplier...

Size Guide Illustration
Wheel Size Inside leg Child Height Approx. Age
12 inch 33 - 38(cm) 85 - 100(cm) 2 - 4
14 inch 38 - 43(cm) 95 - 100(cm) 3 - 5
16 inch 43 - 48(cm) 110 - 120(cm) 4 - 6
20 inch 48 - 58(cm) 120 - 135(cm) 6 - 8
24 inch 61 - 68(cm) 135 - 145(cm) 8 - 10
26 inch 68 +(cm) 145 +(cm) 10 +


In contrast to many children's bikes, Frog bikes are sized by the leg length.

Once you have measured the inside leg, use the table below to find the right size of bike for your child. Note Frog give the MINIMUM inside leg length for each bike, with the saddle at its lowest setting. At this height, the child will safely and comfortably be able to get their feet on the ground. Don’t worry - Frog Bikes have long seat posts, so the saddle can be raised a long way as the rider grows.

Size Guide Illustration
Frog Bike Min inside leg Approx. age
Tadpole 34(cm) 2-3
Frog 43 43(cm) 3-4
Frog 48 48(cm) 4-5
Frog 52 52(cm) 5-6
Frog 55 55(cm) 6-7
Frog 62 & 62 MTB 62(cm) 8-10
Frog 69 &69 MTB 69(cm) 10-12
Frog 73 73(cm) 12-14
Frog 78 78(cm) 13+
72 MTB 72(cm) 13+
Frog 58 Racer 58(cm) 6 -7
Frog 67 Racer 67(cm) 8 -12
Frog 70 Racer 70(cm) 11-14
     

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