Round Trampoline Jumping Mat (16' Frame with 108 8.5" springs) Fits 16' round frame with 108 v-rings for 8.5" springs Frame Size: 16 feet (Measure outside bar to outside bar). Spring Size: 8.5 inches (Remove one spring, measure from hook to hook). Spring Count: 108 (Springs are SOLD separately). Made of U.S.A. Permatron Fabric for the ultimate rebounding surface!