15 foot and 16 foot trampolines require a really large garden or backyard. The smart thing to do is measure the area you plan to install the trampoline before you make your purchase. Trampolines require a clearance area. If you area looking at models that do not need a safety enclosure (ie in-ground trampolines) the you need an 8ft clearance zone around the 16ft trampoline. If are a going to purchase a 15ft trampoline with a safety enclosure you only need to a 2ft clearance zone. Therefore, you will need to include the clearance area in your calculation of what size can fit in your garden.
All trampolines no matter what their size come with a weight restriction. The approximate weight restriction on the 15ft trampolines is 200lbs. So include this when making your decision on which model to purchase.
If you are would like to decrease the size take a look at our 14 foot trampoline.