Trampoline size guide: 8ft, 10ft, 12ft and 14ft

What the sizes mean

Round trampolines in the UK are sold by their diameter in feet, measured across the frame. The jumping mat is smaller than the frame because the springs and pads take up room around the edge. Rectangular and oval trampolines are usually given in metres or feet as length by width, and some brands quote both. When you compare, make sure you are comparing the same measurement – frame size to frame size.

Our size pages match products within about 15 cm of each nominal size, because brands round their measurements differently. A trampoline described as 4.3 m, for example, appears on the 14ft page.

How much space do you need?

Take the frame size and add clear space on every side. How much depends on the model – the manufacturer's manual gives the figure, and it is the one to follow. The clear zone should be free of fences, walls, trees, play equipment and hard edges, and there should be nothing overhead at jumping height. Measure the space with a tape rather than estimating by eye; gardens usually turn out smaller than they look.

1. Measure the longest and shortest sides of the level area.
2. Subtract the manufacturer's clearance from each side.
3. The remaining space is the maximum frame size you can fit.
4. Mark the outline with string or garden hose and live with it for a day.

8ft trampolines

An 8ft trampoline suits small gardens and younger children who will mostly bounce on their own. It is the most affordable size and the easiest to fit, but the jumping area is limited, so children tend to outgrow it sooner. Check the maximum user weight carefully, as smaller models are often rated lower.

10ft trampolines

10ft is one of the most popular sizes in the UK. It fits many family gardens and gives a child enough room to move without taking over the lawn. If you are unsure between two sizes and 10ft fits comfortably with clearance, it is a sensible default.

12ft trampolines

A 12ft trampoline gives noticeably more room and is a good choice for families with two or more children who will take turns, or for older children and teenagers. It needs a good-sized lawn once clearance is added, so measure carefully.

14ft trampolines

14ft is for large gardens. The extra space suits older children and adults, but the footprint with clearance is substantial and assembly is a bigger job. If you are drawn to 14ft because you want room for tricks, consider a rectangular trampoline instead – it uses its area more evenly.

Rectangular and oval sizes

Rectangular and oval trampolines are sized by length and width. North, for example, sells the Pioneer in 3.5 × 2.5, 4.2 × 2.9 and 5.0 × 3.5 m, and the Performer only in 4.6 × 3.1 m (about 15 × 10 ft). Because the bounce is more even, a rectangular trampoline can feel roomier than a round one of similar area. It does need a long, narrow space, so check both dimensions plus clearance.

Size and in-ground trampolines

In-ground trampolines follow the same logic, but the hole you dig is part of the decision. North In Ground comes in rectangular 3.0 × 1.9, 3.6 × 2.5, 4.6 × 3.1 and 5.2 × 3.7 m and round 3.0 and 4.3 m, according to the manufacturer. Read our in-ground trampolines guide before choosing a size.

Which size is right for you?

Size and age

Younger children usually bounce gently in the centre and do not need a very large mat, which is why 8ft and 10ft are common choices for families with small children. As children grow they want more room, and a trampoline that felt big at first can feel small a few years later. If you expect to keep the trampoline for many years, it can make sense to choose one size larger than you need today, as long as it fits with clearance. Always follow the manufacturer's recommended minimum age and maximum user weight. See trampolines for kids.

Size and budget

Larger trampolines cost more, and not only because of the extra material: bigger frames need stronger springs and more of them to give a good bounce. When comparing prices, compare like with like – the same size and shape, with the same features such as a net and pads included. A cheaper 14ft trampoline is not necessarily better value than a well-specified 12ft one. Our compare tool puts specifications side by side, and our scores are never affected by commission.

Measuring tips

• Measure on the ground, not from a garden plan – fences and beds often sit differently from the drawing.
• Check for slopes; a small gradient over several metres can matter.
• Look up for branches, washing lines and overhead cables.
• Remember access: you need space to carry the parts in and assemble them.

How to use our comparison

Every product in our comparison is shown with the details the manufacturer or retailer actually states. If a figure is missing – maximum user weight, warranty length or spring count, for example – we show "n/a" rather than guess. Scores are based on specifications across safety, performance, durability, ease of use and value, and any commission we may earn from retailers never affects them. We have not tested the trampolines hands-on, so use the comparison to quickly rule out models that do not suit you, then read the manufacturer's manual and terms before you decide. We explain exactly how everything is calculated on our how we compare page.

Keep comparing

Read how to choose a trampoline for the full picture, or see our best trampolines list.

Compare trampolines by size

Always follow the manufacturer's manual and local regulations. This guide does not replace the instructions supplied with the product.