Kids Bikes Size Guide

Finding the right size of kids’ bike doesn’t have to be difficult and overwhelming. Once you have the necessary information and measurements, picking out the one is easy! Below, you’ll find all the information you need.

Ages 2 to 4 Years

Kids’ bike sizing is an easy task when you know how to measure properly. If your child falls within this age range, this section is perfect for you. Grab a tape measure to measure the inside of your child’s leg, and make sure to have their shoes on.

You and your little rider’s choice will depend on how advanced they are at riding a bicycle. You can choose between a balance bike or a bike with stabilisers.

Balance bike sizes

Age Range 2-4 years Inside leg 30 - 40cm 33 - 43cm Gingersnap Balance ✅ - Moonbug Balance - ✅

 

A Bobbin balance bike is designed to help a child learn how to balance on a bike before learning to ride one. This gives them the stability they’ll need as they get older. When using one, they’ll keep their feet flat on the ground and push themselves around.

Before moving to full-sized models, make sure your kid is a confident rider. They need to have a sense of balance and be a confident pedaller.

Children's pedal bike sizes

Age Range 2-4 years Inside leg 33 - 43cm 35 - 45cm Gingersnap 12" ✅ - Moonbug 12" Skylark 12" - ✅ Gingersnap 16" Moonbug 16" Skylark 16" Brownie Junior 16" - - Gingersnap 20" Brownie Junior 20" Hornet 20" - - Gingersnap 24" Hornet 24" - -

 

For your child’s first pedal bike, you’d look at 12-inch kids’ bikes. Most come with stabilisers, which can help kids gain confidence before moving on to just two wheels. 

If your child has an inside leg measurement of between 33cm and 45cm in length, consider these units. But if they fall above these measurements, go for bikes designed for older ones instead.

 Bike Sizes for Ages 4 to 6 Years 

The provided table is helpful for children aged 4 to 6. Measure your child’s inside leg length while wearing shoes. For this age range, you’ll want a 16-inch bike. Then, refer to the chart below to find the best-fitting bike size for your child.

Age Range	4-6 Years
Inside leg	40 -54 cm
Gingersnap 12"	-
Moonbug 12" Skylark 12"	-
Gingersnap 16" Moonbug 16" Skylark 16" Brownie Junior 16"	✅
Gingersnap 20" Brownie Junior 20" Hornet 20"	-
Gingersnap 24" Hornet 24"	-

  

At Bobbin, we offer a variety of sizes, ensuring you have plenty of options to choose from! One notable feature is the adjustable bike saddle position. This allows young riders to reach the pedals while seated on their two wheels with ease.

Remember, the ideal bike size is determined by their inner leg length, not just their age!

Bike Sizes for Ages 5 to 8 Years

Here’s a size guide to help determine which bikes for 8 year olds would suit your child. Once again, it’s based on the length of the inside leg in centimetres with shoes on. If your little rider is in this age range, take a look at the chart below:

Age Range	5-8 Years
Inside leg	52 - 64cm
Gingersnap 12"	-
Moonbug 12" Skylark 12"	-
Gingersnap 16" Moonbug 16" Skylark 16" Brownie Junior 16"	-
Gingersnap 20" Brownie Junior 20" Hornet 20"	✅
Gingersnap 24" Hornet 24"	-

 

 

This age group has a wider variety of wheel sizes. This time, you’ll be looking for a 20-inch wheel bike. Our kids hybrid bike selection, Hornet bike, is within this range.

Bike Sizes for Ages 7 to 11 Years

The size guide below will help you decide which dimension is best for kids under the age of 7 to 11. When looking for the right wheel size, try looking at 24 inch bike age. This is the perfect range for a child that would fall into this height and age range. And if you’re considering a bike size for 11 year old, look at our 26 inch bikes.

Age Range	7-11 Years
Inside leg	60 - 73cm
Gingersnap 12"	-
Moonbug 12" Skylark 12"	-
Gingersnap 16" Moonbug 16" Skylark 16" Brownie Junior 16"	-
Gingersnap 20" Brownie Junior 20" Hornet 20"	-
Gingersnap 24" Hornet 24"	✅

 

If your little one is taller or smaller, then you may need to look at different age ranges to find.

Round-up

After reading this detailed guide, you should now have the information you need to pick the right bike size for your child. At Bobbin, we have everything from bikes for kids to bikes for toddlers, including those with training wheels. If you need something larger or lighter, we have options for you too!
Should you have any questions, feel free to contact us. Next on your reading list: What Bike Sizes Are Right for Adults?