Double-square painting

Double-square paintings have uncommonly large canvases. Vincent van Gogh, for example, used them almost exclusively during the final weeks of his life in Auvers, in June and July 1890. To arrive at this size, Van Gogh simply had to combine the legs of two standard sizes: the 50 cm leg from a size 12 and the 100 cm leg of a size 40 stretcher. The result was a double-square of 50 x 100 cm, and from this size easily the square could be derived by using two 50 cm legs.