12' x 28' Canvas Tarp 10oz/15oz Olive Drab with D-Rings Approximate finish size is 11'6" x 27'6" due to hems, seams. Weather may cause canvas to shrink. 100% single-filled duck canvas, industrial-rated. Treated with Canvak, the highest quality treatment available. Water-repellent, mildew-resistant. 10oz per square yard before treatment and 15oz per square yard after treatment. Sewn, fabric-reinforced zinc-plated steel D-rings every 24" along sides, brass grommets in corners.