The sign frame is 7/16 inch thick black styrene plastic. This holder is 14 x 11 (W x H) with a magnetic base. The sign frame has mitered style edges and a slot opening that makes it easy to insert cards. This kit is simple to assemble and can be used horizontally or vertically which gives you more signage options. The sign frame can be purchased in a variety of sizes and qualifies for quantity pricing when 24 are bought at one time.