SkyBound Trampoline Mat with 72 v-rings (Fits 12 foot Trampolines with 5.5" Springs) (Fits brands Bounce Pro, Sports Power, and more) Designed to fit 12ft Round Trampolines (12' steel frame diameter) This Trampoline mat fits trampoline brands such as Bounce Pro and Sports Power This trampoline mat has a diameter of 127 inches with 72 v-rings This Trampoline Jumping Mat is designed to fit many trampoline models sold primarily at Walmart Each of your springs should be 5.5 inches long (unstretched from hook-end to hook-end)