Don"t throw away your perfectly good trampoline when all it has is a bad mat. Replace it with the 13 ft. Trampoline Mat - Fits Skywalker. This square trampoline jumping mat is designed to fit the Skywalker trampoline model STSC13BC, however can fit any square 13 x 13-foot trampoline with an 84-spring count that uses 7.5-inch springs. It"s made of durable, fade- and weather-resistant permatron to last for years.