whould a 12' foot trampoline be big enough?

Yes a 12 foot trampoline would be big enough to have a ton of fun on! Accidents can happen yes, but they also happen when you ride a bike or play any other sport! Keep the amount of accidents down by following the safety rules. Like with all physical sports, rules are there for a reason. Trampolines are a great source of cardio, a great way to enjoy the great outdoors and great entertainment. There are lots of games you can play on them too...

An alarmingly high percentage of the injuries and deaths sustained by children happen from trampolines, either by unsafe use of them by the kids, and/or by poor supervision by their parents. The thing with trampolines is ... by the time you see danger, it's too late because gravity works so well.

Look up the injury stats and see if you can't find a more safe way to have fun instead.

Personally, I would never have one, however ... if you're hellbent on buying one, get a bigger one with more area for jumping. The vast majority of injuries happen when a part of the body strikes the sides (even though they're 'padded'), or when someone falls out entirely. I don't think 12' is big enough.

This is my view.

This is the American Academy of Pediatrics advice on trampolines: "Despite all presently to be had measures to preclude damage, the capabilities for severe damage even as utilizing a trampoline stays. The want for supervision and knowledgeable body of workers perpetually makes residence use tremendously unwise. The trampoline must now not be used at residence, within or external. During anticipatory steerage, pediatricians must advocate father and mother not ever to buy a residence trampoline or enable kids to make use of residence trampolines. The trampoline must now not be facet of hobbies bodily schooling categories in faculties. The trampoline has no location in out of doors playgrounds and must not ever be viewed as play gear. The restrained use of trampolines below direct supervision of bodily therapists, athletic running shoes, or different correctly knowledgeable participants for designated scientific stipulations, adding conditioning and/or rehabilitation of accidents, isn't addressed on this declaration. The restrained use of trampolines in supervised coaching techniques (eg, gymnastics, diving, and different aggressive exercises), must incorporate the layout and behavioral strategies that comply with. "