This 12x16 size is in the 4:3 Cinema. Pure medium weight Belgian Linen finished to a primed weight of 12 oz.. It is double sized and double primed with archival quality alkyd oil primer, making the ground impervious to paints leaching through and harming the fabric. Suitable for oil or alkyd paints only. It is very absorbent and is a fabulous painting surface. The surface color has an off-white grayish tint. Linen is the world's strongest natural fiber. It has oils that keep it flexible and prevent disintegration over time. The surface has a characteristic linen texture. There is a 1/2" gap between the canvas and frame, eliminating the unwanted lines that occur when the gap is less. We never use finger joints in our wood frames, which often fail under tension and over time - the glue joints give up, and are unsuitable for paintings intended to last for centuries. 3D Pro features double tongue and groove corners, a feature for which we earned a patent! Each corner features 4 pre-installed keys. Stretched using our proprietary MuseumWrap method, producing a drum-tight-stretch, up to 50% tighter than other methods, and with balanced tension across the surface. The corners are uncut and neatly folded, making it possible to remove and re-stretch the canvas on the same size frame.