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 60 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)