ZELUS 25in. Balance Ball
- Exercise Ball
- 1
- Blue
- 25 inches
This half ball trainer earns its keep mainly on the flat, non-rolling base and the bundled bonus ball. Worth it if a stationary wobble trainer is genuinely what you want, not a bouncy full stability ball.
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How it ranks among the 88 exercise balls we track
4.5★ across 775 Amazon ratings, Bayesian-smoothed toward the category average.
775 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
500+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 88 exercise balls we track - how the scorecard works · full exercise balls data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jul 5, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
This half ball trainer sits on a 25 inch flat, non-slip base rather than rolling like a full stability ball, with a foot pump, two resistance bands, and a separate full-size exercise ball included in the box.
This is a half ball balance trainer, not a standard round stability ball, so the base stays flat on the floor while the dome flexes underfoot or underhand. The bundle folds in a second, fully round exercise ball plus two resistance bands, covering stretching and light resistance work alongside the balance training. No owner reviews are on file yet for this listing, so treat the maker's durability claims as unconfirmed.
- 25 inch wide flat base with anti-slip TPR matting
- 8 inch dome height for a moderate wobble range
- Two resistance bands with cushioned grips included
- Foot pump and a second full-size exercise ball in the box
Who it's for
Suits anyone building a home core and balance routine who wants a stationary, flat-footed trainer rather than a bouncy full round ball, including older adults working on stability. Less suited to lifters who specifically want a rolling stability ball for slam or bounce work.
Strengths and trade-offs
Drawn from this product's published specifications.
- Flat, anti-slip base stays put during standing or plank work
- Comes with a second full exercise ball and two resistance bands
- Foot pump included, no separate inflator needed
- No owner reviews yet to confirm long-term durability
Performance notes
The flat ABS base with anti-slip TPR matting keeps the dome from sliding during single-leg or push-up work, while the textured PVC surface adds grip for hands and feet. The included foot pump handles inflation without a separate air source, and the 8 inch dome height sets a moderate wobble range compared to taller trainers.
Specifications
| Brand | ZELUS |
|---|---|
| Unit Count | 1 |
| Color | Blue |
| Size | 25 inches |
| Age Range Description | Adult |
How it compares
This product against the closest alternatives we track in exercise balls.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| ZELUS 25in. Balance BallThis product | 4.5 / 5 | 775 | 4.2 / 5 |
| Primasole Exercise Ball for Balance Stability Fitness Workout Yoga Pilates at Home Office…Primasole | 4.6 / 5 | 2,700 | 4.5 / 5 |
| ProBody Pilates Small Exercise BallProBody | 4.5 / 5 | 13,059 | 4.4 / 5 |
| Trideer Exercise BallTrideer | 4.6 / 5 | 5,804 | 4.4 / 5 |
| Exercise Ball - Yoga Ball for Pilates & Fitness - Birthing for Pregnancy, Stability…Exercise | 4.7 / 5 | 2,300 | 4.4 / 5 |
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Questions about the ZELUS exercise balls
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the ZELUS half ball come with a pump?
Yes, a foot pump ships with the set for inflating the dome.
Is this a full round stability ball or a half ball?
It is a half ball wobble trainer with a flat base; the set also includes a separate full round exercise ball.
What keeps the base from sliding on hard floors?
An anti-slip TPR mat on the underside of the 25 inch base is designed to grip the floor during use.