Copper Sprinkler Works Garden Sprinklers© will water up to a 20-foot diameter area. Step-spikes have a brass swivel for each hose hook-up, allowing for sprinklers to be attached in series. Sprinklers are approximately 30 inches in height (each sits on an 18" stem). Heads are 8 inches in diameter with a copper inlay. The large Garden Suns (with or without glass) have 12-inch heads and are approximately 36 inches in height.