4.27m Trampoline. A wonderfully large trampoline, Trampolines Australia's new 14 foot circular trampoline will provide you and your family with one of the largest and safest circular trampolines available in Australia today. Specially made for confident kids and for older users, our 14 foot trampoline comes with all the safety and game features of our 2009 range, meaning you will be super safe while enjoying the power and space that a larger trampoline can afford.