Thinking of buying your child a balance bike? Congratulations! You’re about to introduce them to a world of fun, adventure, and super riding skills. But with so many options on the market, figuring out which is best for your wannabe cyclist can be overwhelming. Luckily, this guide breaks down balance bike sizes, from measuring tips to seat heights, so hop into the saddle and let’s roll into it.
What’s in this guide
- Balance bikes are designed for children between the ages of 18 months and 6 years old.
- A baby can use a balance bike from as young as 12 to 18 months old with close parental supervision.
- A balance bike for a 2-year-old should have 10 or 12-inch wheels.
- 3-year-olds should ride a balance bike with 12-inch size wheels.
- The balance bike size for a 4-year-old is a bike with 12-inch or 14-inch wheels.
- A balance bike’s seat height refers to the distance from the ground to the top of the seat and should be 1-1.5 inches less than your child’s inseam.
What Age Are Balance Bikes for?
Balance bikes are for children between the age of 18 months to 6 years old. They are pedal-free, lightweight, and low to the ground, making them ideal for safely teaching toddlers balance and coordination before transitioning to a traditional bicycle.
However, as every child develops at their own pace, focusing on their abilities rather than following strict age guidelines is paramount. If your kiddo is hesitant or nervous about cycling, a balance bike is a wonderful way to ease them into riding, regardless of how old they are!

Balance Bike Size Chart
The balance bike size chart below shows you at a glance which wheel size and seat height are best for each age range based on the approximate length of their inseam.
| Age Range | Approx. Inseam Length | Wheel Size | Seat Height |
|---|---|---|---|
| 18 months to 2 years | 10 – 14 inches | 10 inches | 9 – 12 inches |
| 2 to 3 years | 13 – 16 inches | 12 inches | 12 – 15 inches |
| 3 to 4 years | 14 – 18 inches | 12 or 14 inches | 15 – 20 inches |
| 4 to 5 years | 16 – 20 inches | 14 or 16 inches | 18+ inches |

Balance Bike Seat Height
Balance bike seat height refers to the distance from the ground to the top of the seat and should be 1-1.5 inches less than your child’s inseam, enabling them to place their feet flat on the ground while seated.
Getting this right is one of the most vital factors for ensuring a proper fit — for younger toddlers, the seat height typically starts around 9-12 inches, while bikes for older kids may go up to 18 inches or more.
Fortunately, most bikes come with adjustable seats, allowing the bike to grow with your little one to provide years of use and joy.

When Can a Baby Use a Balance Bike?
A baby can use a balance bike from as young as 12 to 18 months old, depending on their physical development and confidence in walking. However, we recommend opting for a specially designed model, often called a “baby balance bike”. These typically feature a three-wheel frame with one tyre at the back and two at the front for added stability and don’t require the same level of coordination as a traditional two-wheeler.
Encouraging your baby to start riding from a young age has countless benefits, including providing them with an entertaining way to explore their environment and making the transition to pedal bicycles easier later on. Remember, though, these eager adventurers are still mastering their control and awareness, so supervision is key.

What Size Balance Bike do you Need?
A balance bike’s size is determined by the diameter of its wheels, which typically ranges from 10 to 16 inches. For toddlers and younger children (ages 1.5 to 3 years), smaller bikes with 10 to 12-inch wheels are ideal, as they are easier for tiny hands to control. For older or taller children (ages 4 to 6 years), 14 to 16-inch wheels are better suited, as they provide more stability.
Ensuring your child’s balance bike is the correct size is essential for their safety and comfort. As a top tip — always opt for a bike with an adjustable seat and handlebars to ensure it still fits your little one as they grow.


What Size Balance Bike for 2 Year Old?
The balance bike size for a 2-year-old is one with 10 or 12-inch wheels, as most tots of this age have an inseam of around 10 to 14 inches. At this stage, children are still developing their motor skills, so choose a lightweight balance bike with a very low seat height to ensure they can comfortably touch the ground with their feet.
What Size Balance Bike for 3 Year Old?
The balance bike size for a 3-year-old is one with 12-inch wheels, as the typical inseam for a child of this age is between 13 and 16 inches. Toddlers are the perfect age for balance bikes, as they’ve developed the coordination and strength needed to ride confidently. Although they might start by walking the bike, they’ll soon progress to gliding and lifting their feet to build speed.
What Size Balance Bike for 4 Year Old?
The balance bike size for a 4-year-old is one with 12-inch or 14-inch wheels, as children at this stage usually have an inseam of 14 to 18 inches. Pick a balance bike with room to grow to provide a comfortable ride and accommodate for surprise growth spurts.

What Size Balance Bike for 5 Year Old?
The balance bike size for a 5-year-old is one with 14-inch or even 16-inch wheels, depending on their height, as the inseam range for this age group is often between 16 and 20 inches. Look for a sturdier frame, as older kids can handle slightly heavier balance bikes and watch as their balance develops, glide by glide — they’ll be ready to transition to a pedal bike before you know it!
What Age is a 10 Inch Balance Bike for?
A 10-inch balance bike is for toddlers aged 18 months to 2.5 years old. Thanks to their lightweight frames, lower seat heights, and narrower handlebars, these bikes are perfect for smaller riders just beginning to get to grips with balancing.
How to Measure for a Balance Bike
Measuring your child for a balance bike is simple and guarantees they can use it comfortably and safely. The most critical measurement is the inseam, as it determines the correct seat height for the bike. Follow these steps for an accurate measurement:
- Stand your toddler against a wall: position your child so they stand upright against a flat wall, wearing the shoes they will use when riding the balance bike.
- Find a pretend bike seat: place a book or an object of similar size, like a ruler, between your child’s legs and level with the floor to mimic the position of a bicycle seat.


- Get measuring: work out their inseam length by stretching a tape measure from the top of the book or object to the ground.
Other balance bike measurements to consider include handlebar height. These must be positioned at or slightly below the youngster’s chest or belly button. If the handlebars are too high, it can be uncomfortable for the child to steer; if they are too low, they might have difficulty controlling the bike.
Also, pay attention to the bike’s overall length — the distance from the rear wheel to the front. It should suit the child’s body size and offer enough space to glide and steer without feeling cramped.
About the Author
Hannah Hill
Entrepreneur, and mother of three. Hannah is a toy expert with 20+ years in the online toy industry, founding the Kidaroos website that sells 10,000+ toys per year. Hannah is always looking for new, innovative ways to keep everyone's kids active and energised in a world full of screens and social media and has been featured in publications such as Authority Magazine.


