The Probert Encyclopaedia of General Information

CANVAS

Canvas is a coarse, unbleached cloth made from hemp or flax and used for sails, tents, etc. When prepared for portrait-painting it is classed as kit-cat, 28 by 36 inches, three-quarters, 25 by 30; half-length, 40 by 50; bishop's half-length, 44 or 45 by 56;
bishop's whole length, 58 by 94.
Research Canvas