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The Different Bosu Ball Sizes: Which One Is For You?

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Bosu Balls are fitness equipment options that can offer many benefits. What are the different Bosu Ball sizes and which one is right for you?

You can describe the Bosu Ball as the top of a stability ball attached to a flat surface. You can use Bosu Balls in a variety of ways.

Purely in terms of height and diameter dimensions, there are two main Bosu Ball sizes. The first one is the smaller Bosu Sport with a diameter of 22″ (50 cm) and height of 7″ (17.8 cm) when inflated.

Secondly, there are the other Bosu Ball types with a diameter of 26″ (65 cm) and a height of 10″ (25.4 cm) when inflated.

Besides these, there are off-brand half ball trainers. The sizes of these can vary from brand to brand but one example has a diameter of 23″ (58.4 cm) and height of 10″ (25.4 cm) when inflated. So smaller than most Bosu Balls but slightly bigger than the Bosu Sport.

Below you can find a handy chart with all the Bosu Ball sizes. This article will also explain more in depth what Bosu Ball types are better for what types of situations.

“The Original”Bosu ProBosu NexgenBosu SportOff-Brand Option
Diameter26″ (65 cm)26″ (65 cm)26″ (65 cm)22″ (50 cm)23″ (58.4 cm)
Height When
10″ (25.4 cm)10″ (25.4 cm)10″ (25.4 cm)7″ (17.8 cm)10″ (25.4 cm)
300 Pounds
(136.05 Kg)
350 Pounds
(158.73 Kg)
350 Pounds
(158.73 Kg)
250 Pounds
(113.38 Kg)
660 Pounds
(299.32 Kg)
6 FeetRound StrapRound Strap6 Feet6 Feet
Main UseHomeHome & GymHome & GymHomeHome
Bosu Ball sizes chart

“Big” Bosu Balls vs the “small” Bosu Ball

There are a few factors to consider when choosing what the best Bosu Ball is for you. One of the first things to keep in mind is the difference in size between the Bosu Sport and the other Bosu Ball models.

One of the most typical ways to use a Bosu Ball is for balance and coordination training. For this goal, the “bigger” sizes will be more challenging which can result in more skill progress faster.

Another way to use Bosu Balls is as back support for exercises like crunches. For these movements, the size of the Bosu Ball will not matter that much. Similarly, for something like ankle revalidation the difference will not be that big.

Lastly, you may want to take your Bosu Ball with you when traveling somewhere. This piece of fitness equipment is not the best when it comes to this but the smaller dimensions of the Bosu Sport will be more compact than the other sizes.

So when only talking about Bosu Ball size, the question is what you will use the ball for. The bigger dimensions are often better but they do come at a slightly higher price.

Factors besides size to keep in mind

When choosing the right Bosu Ball for you, size is definitely an important factor for storing your Bosu Ball, how good it will be for what types of training, if it fits in your car, etc.

That being said, you should likely take the other details of these fitness equipment options into account. Below you can find some of the most important ones and how to approach your decision.

Weight capacity

Even before paying attention to the difference in sizes of half balance trainers, you likely want to take a look at their weight capacity.

In the best worst case, using a Bosu Ball with a weight limit that is too low leads to faster wear and tear. In the worst worst case, the Bosu Ball can break down when using it which in turn can lead to injuries.

The weight limits of Bosu Ball vary from model to model. For example, the smaller Bosu Sport only has a weight limit of 250 pounds (113.38 kg). This is a lot less than the “bigger” Bosu Pro and Nexgen with a weight limit of 350 pounds (158.73 kg).

Choosing the right Bosu Ball type when it comes to weight limits can save you from accidents and save you the money from having to replace your model over and over.

Anti-slip support style

Something else to keep in mind is what type of anti-slip support your half ball balance trainer has. The main difference here will be between a few rubber feet and a complete round rubber anti-slip strap.

The smaller size Bosu Sport, “The Original”, and most of the off-brand alternatives use 6 rubber feet. On the other hand, the Bosu Pro and Bosu Pro Nexgen use the full anti-slip strap.

Whether this factor is important mostly depends on how you want to use your half ball balance trainer. More specifically, the question is whether you will push sideways against your Bosu Ball when it is on its flat side or not.

Main use

With any (fitness) product there is always some type of tradeoff between quality and price. You could make a Bosu Ball as strong as possible but for some uses, this is just not needed.

The Bosu Ball describes this “feature” as whether or not a model is intended for commercial use or not. This means whether or not it is made for a busy gym environment with a lot of usage hours or more for an at-home setting.

All models can be used at home but the Bosu Pro and Nexgen are made to withstand these commercial environments on top of that.

With off-brand alternatives it is not always clear whether they will be able to deal with the same conditions.


Lastly, there is the price of each model. The bigger Bosu Ball sizes may be better for types of training like balance but bigger dimensions also means more material required to make the ball. In turn, this generally leads to a higher price.

If you plan to use your Bosu Ball a lot, it can be worth it to invest in some of the “big” and sturdy options. Even so, the initial investment does have to come from somewhere.

Check Bosu Ball prices


Matt Claes

Matt Claes founded Weight Loss Made Practical to help people get in shape and stay there after losing 37 pounds and learning the best of the best about weight loss, health, and longevity for over 4 years. Over these years he has become an expert in nutrition, exercise, and other physical health aspects.