The black floating frame adds 1 inch to each side of the canvas regardless of the canvas size/dimension. For example, adding a black floating frame to a Large canvas (40x30 inches) will make the overall dimension of the canvas 42x32 inches with the frame.
Black floating frame is an optional addition to your canvas during your purchasing process. Since these frames are built affixed to the canvas during the production process, we are not able to sell them separately.