Canvas

Canvas (Lat. cannabis, hemp), a kind of coarse, unbleached, hempen cloth, used for sails, paintings, etc. "Sail canvas is 18 to 24 in. wide, and numbered 0 to 8, 0 being thickest. A bolt of canvas is 39 to 40 yards long, and weighs 28 to 48 lbs." Also, the unbleached cloth, regularly woven in squares, which is used for tapestry work.