Gamma First Set 18' Junior Tennis Net The First Set™ 18' Junior Tennis Net is portable, lightweight (22 lbs.), and quick and easy to set up. The net comes with a zippered nylon carrying case and can be used indoors or out, on a tennis court or across a driveway. At 18 feet long by 33 inches high, it is the perfect size for teaching children. Conforms to the USTA QuickStart Tennis format standard for a Jr. net on a 36' court.