Tarpsupply 20' X 20' Multi-purpose Blue Poly Tarp Finished Size is 3-5% or up to 10 inches less after edges are hemmed UV treated on both sides for superior sunlight protection Water Resistant and Wind Resistant, Rot and Mildew Resistant Rope reinforced hemmed edges for added strength 10 x 8 Weave, 6 MIL Thick