The sign frame is 7/16 inch thick high impact styrene plastic. This kit is easy to assemble and simple to use, just slide the cards into the top slot. The sign frame is 11 x 14 (H x W) and can be used in the horizontal or vertical position making it extremely versatile. This black holder has a 4 inch (H) stem on a sturdy centered base so it can be placed on any flat surface. The sign frame is available in a variety of sizes and qualifies for cost effective quantity pricing when 24 are purchased at one time.