White Cast Acrylic Sheet Nominal 15.850 x 15.850 Inches x 0.118 Thick (Opaque Non-Transparent) with Clear Film Masking Please Allow Plus or Minus 0.060 tolerance in width and length. Premium Opaque Acrylic Sheet Lightweight, Impact-Resistant Easy to Remove Clear Film Masking For Prototypes, Signs, Templates, Photography, Too Many to List.. Reflective / Glossy Surface on Both Sides