Each matte canvas comes with back hanging already included for convenient placement. The frame is made with profile radiata pine that is ethically sourced from renewable forests. .: Materials: cotton and polyester composite (canvas), pine wood (frame) .: Comes in 48 different sizes (including vertical and horizontal orientations) .: Horizontal, vertical and square options available .: Soft rubber dots on bottom back corners for support .: Back hanging included .: Inner frame made with radiata pine sourced from renewable forests .: Please note: Due to the production process of the canvases, please allow for slight size deviations with a tolerance +/- 1/8" (3.2mm)