What farmers should know to begin framing an unstretched painting rolled in shipping tube. The important parameters are the size of the painting and canvas bleeding around the painting. Canvas bleeding is unpainted canvas shoulders left for purpose of stretching a painting on wooden frame called stretching frame. The dimensions of the stretching frame width and height are extrapolated from the size of painting. While bleeding on the canvas must take into consideration thickness of the stretching frame and be wide enough to use stretching tools conveniently.