Rank #3 in Best Plyo Box 2026: 10 Ranked, and the Spec Sheets That Argue With Themselves
GYM MASTER High Density Foam Plyo Jump Box
Price and rating as shown on Amazon when we collected them. Both change.
The GYM MASTER High Density Foam Plyo Jump Boxes take third place in this guide at £59.99. It is the only foam box near the top of the list, and on its own Best Sellers Rank line it is the number one seller in Jumping Trainers, with 2,383 in Sports & Outdoors alongside it. One box is meant to do the work of three: the bullets say you flip the unit to switch between 16, 20 and 24 inch training levels, and one reviewer notes that each side is labelled 16", 20" and 24".
The number that does not hold up on this page is the rating count. The header reports 166 customer ratings; the five bars beneath it read 78, 14, 4, 1 and 3, which add up to 100. Both figures are printed in the same listing and they cannot both be right. There is a smaller disagreement on weight: the bullets sell the box at 3.3kg, while the Package Dimensions field gives 4.75kg. That gap is what you would expect between a box and a box plus its packaging, but the listing never labels the two figures as different things, so on paper they simply disagree. Everything on this page is taken from the Amazon listing for this box, not from any testing we have carried out.
How those 166 ratings break down
An average hides its own shape. This is the spread behind the 4.6 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £59.99 |
|---|---|
| Rating | 4.6 out of 5, from 166 customer ratings |
| Rating breakdown | 5★ 78, 4★ 14, 3★ 4, 2★ 1, 1★ 3 — a total of 100 |
| Training heights | 16, 20 and 24 inches |
| Shape field (as listed) | 16 x 20 x 24 inches |
| Weight | 3.3 kg in the bullets; 4.75 kg in Package Dimensions (as listed) |
| Maximum load | 200 kg |
| Best Sellers Rank | 1 in Jumping Trainers; 2,383 in Sports & Outdoors |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“The heights of each aspect are clearly labelled - 16", 20", 24". The firmness of the box is just right. There's a tiny amount of give, of flex, to soften one's landing, after jumping on it, or when lifting oneself onto it, one-legged. But it's solid and sturdy too. The black outer case can be unzipped and removed, if need be. It's hard to fault it. Perhaps, if being ultra fussy, there could be an alternative case/wrapper with metric, instead of imperial, measurements.”
Verified purchase“Lovely box, sizes as described. No assembly required, nice surface for my 10 year old to land on.”
What it is up against
The rivals it was ranked against in Best Plyo Box 2026: 10 Ranked, and the Spec Sheets That Argue With Themselves.
Questions people ask
How many heights does the GYM MASTER Plyo Jump Box give you?
Three. The listing says you flip the unit to switch between 16, 20 and 24 inch training levels, replacing three separate plyo boxes.
How much does the GYM MASTER box weigh?
Two numbers appear in the listing. The bullets say 3.3 kg; the Package Dimensions field says 4.75 kg. The listing does not label the second figure as packaging.
What weight will the GYM MASTER foam box take?
The listing rates it at 200 kg, and states that figure covers dynamic jump impact rather than static weight alone.
Why do the ratings not add up?
The header reports 166 ratings. The five bars — 78, 14, 4, 1 and 3 — total 100. Both numbers are given in the same listing, with no explanation of the gap.
How does the GYM MASTER box rank on Amazon?
Its Best Sellers Rank reads 1 in Jumping Trainers and 2,383 in Sports & Outdoors.
What is the GYM MASTER Plyo Jump Box made of?
The listing describes a high-density foam core under a PVC-covered mesh leather shell, with Material type given as Foam.
Comments
Reader comments are not checked against the manufacturer's claims above.
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