This I.D. badge fits very well for 5.6cm x 8.5cm sized badges (approximate). It does not fit standard-sized trading cards, as it is mostly designed for identification cards and/or passes. Paired with the right kind of lanyard they can make for great party gifts, props and activity aides. The front clear window portion is covered by a thick sheet of plastic and is not acrylic; ideal weight for kids and adults as well as a way to prevent dirt and grime from building up inside thanks to the tight sliding feature.