Kids Bike Size
Buying a bike that's the right size is essential. A bike that fits properly will be comfortable, give confidence and make everyday cycling safer. We recommend that every rider visits a Halfords store where one of our in-store experts can help find the correct-sized bike.
If you're not able to visit a store, or the bike's going to be a surprise, then you'll need your child's height to narrow down your choices. When they've stopped moving, and you've got an accurate measurement check out our guide to finding the right size bike for your kids.
Kids Bike Size Chart & Frame Size
| Height (CM) | Child age | Wheel size bikes (Inches) | Purchase page |
| 88 - 97 | First bike | 9" - 10" Bikes + Balance | Shop here |
| 98 - 104 | 3 - 5 | 10" - 12" Bikes | Shop here |
| 105 - 111 | 4 - 6 | 12" - 14" Bikes | Shop here |
| 112 - 116 | 5 - 7 | 14" - 16" Bikes | Shop here |
| 117 - 126 | 6 - 9 | 16" - 20" Bikes | Shop here |
| 127 - 135 | 8 - 11 | 20" - 24" Bikes | Shop here |
| 136 - 144 | 9 - 12 | 24" - 26" Bikes | Shop here |
| 145 - 154 | 9 - 12+ | 26" Bikes | Shop here |
| 127 - 154 | 8 - 12+ | BMX Bikes | Shop here |
For kids 11+ please consider our range of adult bikes. Below is an indication of the sizes you should look for. (For accurate sizing please click here)
| Frame Size | Age (Years) | Height (Inch) | Height (cm) |
| 14 Inch | 11 - 14 | 4' 10" - 5' 6" | 148 - 168 |
| 14 Inch/17 Inch | 12 - 15 | 5' 0" - 5' 8" | 154 - 174 |
| 17 Inch | 13 - 16 | 5' 3" - 5' 10" | 160 - 178 |
A step by step guide to buying the best kids bike
So, if you've narrowed down the size and decided on a style, it's time to choose the best bike for your kid. Here's how:
- Focus on feel: Ensure your kid feels comfortable in the saddle, their feet can reach the handlebars, and their feet can touch the pedals. It's OK if they're stretching a little as they're growing quickly (and it's easy to make minor adjustments), but if they're straining, go for a smaller size.
- Grab the brakes: Being able to safely stop a bike is critical, so ensure your kid can reach and operate both brakes.
- Climb on/off: Check your kid can easily climb on and off the bike and handle the weight. Bigger bikes weigh more, so sticking with a smaller size may be safer.
- Frame material: Steel frames are hardwearing, but they are heavier. Aluminium or alloy frames are lighter. Check your kid can lift or carry a bike before buying.
- Gears: Does the bike come with gears, and if so, are they enough? Check your kid can safely operate the gears (and understand how they work!)
- Do they like the look of it: You want your kid to love the look of a bike, so ask them what they think about it. We stock bikes in different colours, finishes, and styles, so they're sure to find something they like to look at and love to ride.
At Halfords, our staff are highly trained and can help your kid find a frame and a bike that fits. If you're struggling to select a bike, ask for their help. They'll be able to guide you to find a bike that fits correctly and looks cool too.
My kid is between age ranges. Should I go for the bigger bike or the smaller one?
When using the size chart, you may find that your kid is between bike sizes. It means that both bikes should fit your kid with some minor adjustments to the saddle height.
So, should you choose the smaller wheel size or the larger one? Here's a simple guide:
- Choose the bigger wheel size if you want the bike to last longer. You can adjust the saddle height as your kid grows.
- Choose a smaller wheel size for a bike that's easier to handle. Perfect for less experienced riders who want to build confidence.
What happens if my kid's bike size isn't right after we've got it home and given it a test ride?
Just bring it back to the store! In most cases, the bike will probably need a couple of easy adjustments to the seat or handlebars to make things comfortable. Our in-store bike experts can sort this out for you quickly.
And don't worry, it's completely free.