These tarps are 10' by 20' in dimensions and very heavy duty. All StrongTarps have been made to be the strongest in the industry. At actual dimensions, these heavy duty tarps are 8oz, have a stronger weave, and are offered in silver/brown colors. They have a thicker cord sealed into the edge of the tarps, and grommets are every 18". Every side grommet is reinforced by 6 layers of film, and the corners have reinforced sewn-in plastic caps. With UV protection from sun added to the poly, this tarp will perform well in many conditions. Whether a tarp for a boat or equipment or a lumber stack, this tarp will perform extremely well in many conditions.