Art Advantage Artist Canvases are triple primed with acid free acrylic primer. They have a medium texture and uniform weave that readily accepts oils, acrylics, and alkyds paints. 100% natural cotton canvas is pre-stretched over 3/4 x 1 1/2 inch paulownia stretcher bars. Canvases are stapled on the back so that the artist can include the canvas sides in the artwork, thus alleviating the need for an expensive frame. 8 x 8 inch.