25cm Is the Size That Does the Most Work
This is a 25cm mini yoga ball at $21.99, made from thickened explosion-proof PVC with a non-slip surface, available in seven colors and weighing around 100g. The size is the specification that matters. A 25cm ball is small enough to sit between the knees or ankles, and large enough to support the lower back or lift the hips – which covers most of what Pilates, barre and core rehabilitation actually ask a ball to do. Bigger balls become furniture; smaller ones are props for the hands.
Key Benefits
- Thickened anti-burst PVC. Deflates slowly rather than popping if punctured.
- Squeeze between the knees. Engages the adductors and pelvic floor – the reason this is a Pilates and barre staple.
- Support under the back or hips. Adds instability, which keeps the deep core firing throughout a movement.
- Non-slip surface. Stays put against skin or a mat instead of shooting out from under you.
- Around 100g and seven colors. Deflates for storage.
How to Use
- Inflate partially, not fully. A ball with give is more useful than a rigid one – you want it to compress when you squeeze.
- Squeeze between the knees during bridges, crunches and clamshells to engage the adductors and pelvic floor.
- Place under the lower back or hips for supported core work and to add instability.
- Put it under one hand or foot in planks and lunges to make the exercise significantly harder.
- Deflate slightly for storage rather than leaving it fully inflated for months.
Specifications
| Type | Mini yoga / Pilates exercise ball |
|---|---|
| Diameter | 25cm |
| Material | Thickened explosion-proof (anti-burst) PVC |
| Weight | Approx. 100g |
| Surface | Non-slip, smooth |
| Colors | Purple, blue, silver, pink, yellow, black, red |
| Best for | Pilates, yoga, core training, barre, home workouts |
Care & Maintenance
Wipe with a damp cloth and mild soap. Keep away from sharp objects, rough concrete and direct heat. Store partially deflated.
What’s in the Box
- 1 x 25cm mini yoga ball
Frequently Asked Questions
What is a 25cm ball used for?
Squeezing between the knees or ankles to engage the adductors and pelvic floor, and supporting the lower back or hips to add instability during core work. It is the standard prop size in Pilates and barre classes.
What does explosion-proof or anti-burst mean?
If the ball is punctured, it deflates slowly rather than bursting. That matters when you have body weight on it – a standard ball popping under load drops you.
How much should I inflate it?
Not fully. You want it to give under pressure. A rock-hard ball is uncomfortable to squeeze and less effective.
Is 25cm the right size for Pilates class?
It is the common size instructors specify for squeeze and support work. Larger balls change the exercise, so if you are following a class, match the size.
Can I use it if I am pregnant?
Small balls are widely used in pre- and post-natal Pilates for pelvic floor and gentle core work. Check with your midwife or clinician about what is appropriate for your stage.

















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