The vertical sign holder is made of 1/8 inch thick acrylic. This case is 2 x 3 1/2 (W x H) and helps protect your cards and notes from damage. The vertical sign holder has a clear face cover so information is entirely visible. This hanger has a U bend design and features top tab so it fits easily into slatwall grooves. The vertical sign holder is also available in horizontal format and a variety of sizes so it is the perfect way to keep all your information clean and neat.