One of the smallest trampolines around is the rebounder or mini-trampoline.Click to see full answer. Similarly one may ask, is a 12 foot trampoline too small? 12 Foot Round Trampoline It’s a little bigger than the eight to ten footers but is still smaller than the bigger sized trampolines. Most people would call this a medium sized trampoline. If you decide to break the one jumper at a time rule, then only do so with smaller kids.One may also ask, is a 15 foot trampoline big? 12 Ft or 15 Ft Trampoline Comparison So, in comparison, a 15-foot trampoline will have more bounce than a 12-foot trampoline. For instance, 12 ft trampolines are big enough for play and normal bouncing around, while 15 ft trampolines are made more for gymnasts. Accordingly, is a 10 foot trampoline too small? Round Trampolines (8 ft and 8ft & 10ft) The 10 ft and 8 ft trampolines are specifically for those who want to buy a trampoline for their kids and don’t have very large space to afford a bigger one. This smaller size trampoline is just ideal for small courtyard/backyard or for families with smaller children.Is a 14 foot trampoline big enough?As in previous calculation, 12 ft round trampoline will give you roughly 93 sq ft of jumping area while 14 ft will provide around 133 sq ft. 14 ft trampolines are recommended for teenagers or families with several children, as this is enough to accommodate all of them, if they decide to exercise or play together.