The size of ball you use is based on your height/ leg length. When sitting on your ball, your knees should not be raised higher than your hips.
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- 55cm sized ball is usually recommended for ladies under 5’3”
- 65cm is the most universal size ball. This is what use at NYStudio- you will notice they vary!!! Even within the same brand they can vary in how much they can be inflated.
- 75cm sized ball is usually recommended for ladies 5’10” and over
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