Art Advantage Professional Canvas 16 in. x 20 in. Wide Wall- 13.5 ounce, 100% natural cotton canvas, primed 3 times with acid free acrylic primer. Visual edge canvas has a 1.5 in. side wall and is stapled on the back which allows tighter stretching and adds strength. The back staple eliminates the need for an expensive frame. Readily accepts oils, acrylics, and alkyd paints.