The Easiplay Netball unit is easy to use for 5-12 year olds. The height of the ring can be set from 4ft to 10ft. The base must be filled with sand or water prior to play. The poles of the unit slide inside each other with a tightening handle on each. To adjust height unscrew the handle and adjust the ring. This must be done by an adult. H305cm. Diameter 38cm. For indoor and outdoor use.