The sign holder is black 7/16 inch thick high impact styrene plastic and has mitered style edges. This frame has a 4 1/2 x 5 1/2 inch shovel base that is ideal for end caps and bulk items and can be used under product containers for more stability. The sign holder is 5 1/2 x 7 (H x W) and can be used both horizontally and vertically. This kit has a slot opening that makes it easy to insert cards. The sign holder is quick and simple to assemble.