159in Mat for 15ft Trampoline using 96 6.5in or 7in Springs - Standard Fits 15' round frame with 96 v-rings for 6.5" or 7" springs Frame Size: 15 feet (Measure outside bar to outside bar). Spring Size: 6.5 or 7 inches (Remove one spring, measure from hook to hook). Spring Count: 96 (Springsare SOLD separately). Made of U.S.A.PermatronFabric for the ultimate rebounding surface!