Measures 19-13/16 x 14-13/16 inches (approx 20x15 inch). 1 inch thick uv stabilized high density plastic board exporter HDPE Sheets High Density Polyethylene, Black, White, lors FDA 21CFR177.1520 Sec. 2.1, ASTM D4976, PE244, ASTMD1248 Type IV, Class A, Fed Spec LP512, Type 1, Class H, Grade 5. ... pipe grade , playground board, multi-color ...