The hull of a currach was built using thick animal hides stretched over a frame made from wood and wicker. A typical specimen was 20 ft (6.1 m) long by 8 ft (2.4 m) wide with a single mast for a sail and four oars. Crew size ranged from a minimum of two to a maximum of ten. Currachs were not built to carry a weapon or a ram. The seaworthiness of this vessel limited it to coastal waters.