You’re Being Videotaped Smile Floor Stencils are made of Acrylonitrile Butadiene Styrene, more popularly known as the ABS plastic. The size of the stencil is 24” x 24”, and the thickness is 63 mils (1/16 inches), ideal for outdoor use. ABS is chosen for stencils because this type of plastic liquefies upon heating instead of burning, which allows it to be easily injection-molded to any cutout or shape. Additionally, the material is easily recyclable, causing less harm to the environment.