KEEP Exercise Ball Anti-Burst
- Exercise Ball
- Yoga
- Exercise Ball
- 1
A compact, anti-burst ball suited to therapy and core exercises, with a size aimed at deeper stretching than a standard small ball.
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How it ranks among the 88 exercise balls we track
4.4★ across 533 Amazon ratings, Bayesian-smoothed toward the category average.
533 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
3,000+ 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
KEEP sizes this anti-burst exercise ball at 9.8 inches (25cm), built with a thickened wall and matte, non-slip surface for physical therapy, core work, or use as an office chair substitute.
The seller sizes this slightly above the common 9 inch mini ball to give a wider support base for spinal alignment work, and recommends inflating to only 70 to 80 percent for a softer, more contouring feel rather than fully firm.
- 9.8 inch (25cm) diameter
- 1300 lb anti-burst rating
- Matte non-slip exterior
- Doubles as an office chair substitute
Who it's for
Useful for physical therapy exercises, core stability work, or swapping in for a desk chair to encourage posture changes. Not intended as a full size stability ball for standing balance work, given its compact 9.8 inch diameter.
Strengths and trade-offs
Drawn from this product's published specifications.
- Deflates slowly rather than bursting if punctured
- Matte, non-slip surface for seated or floor use
- PVC material free of listed harmful additives
- 9.8 inch size is compact, not a full size stability ball
- Best comfort requires under-inflating to 70 to 80 percent, not full firmness
Performance notes
The honeycomb microporous foam wall is built to deflate slowly rather than burst under puncture, with a listed anti-burst rating of 1300 pounds. The matte surface adds grip against slipping when used as a seat or in floor exercises.
Specifications
| Brand | KEEP |
|---|---|
| Model | KP-25cm-PRO-US |
| Dimensions & fit | |
| Item Weight | 9.5 ounces |
| Item Diameter | 9.8 inches |
| Size | 9.8 inches |
| Capacity & performance | |
| Age Range Description | Adult |
| Construction & materials | |
| Material Type | PVC, Polyvinyl Chloride (PVC) |
| Construction Type | PVC and honeycomb microporous foaming structure |
| Color | Pale Green |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Sport Type | Yoga |
| Ball Type | Exercise Ball |
| Number of Items | 1 |
How it compares
This product against the closest alternatives we track in exercise balls.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| KEEP Exercise Ball Anti-BurstThis product | 4.4 / 5 | 533 | 4.1 / 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 KEEP KP-25cm-PRO-US
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What size is the KEEP exercise ball?
It measures 9.8 inches (25cm) in diameter, sized slightly larger than a standard 9 inch mini ball for a wider support base.
Is the KEEP ball safe if it gets punctured?
The seller states it uses anti-burst honeycomb foam construction rated to 1300 pounds, designed to deflate gradually rather than burst.
Can this ball be used as an office chair?
Yes, the seller markets it as a chair substitute for posture correction, in addition to physical therapy and core exercises.