When ordered unframed, an extra 2-inch border is added around the size being ordered providing extra canvas for mounting. Canvas prints which are unmounted or unframed are usually shipped rolled in a sturdy shipping tube.
Thin Stretch & Mount
The canvas print will be mounted over 1.5 inch thick (depth) stretcher bars and the image will wrap on the sides with a fraction of an inch around the back. These are usually hung without a frame.