This changeable letter set uses 2-inch tall parts to ensure that passersby can see the advertisements from a distance. The plastic character kit features Helvetica font for an aesthetically appealing display. This changeable letter set is white to stand out on a conventional black background grooved display. The insert message board accessory allows users to carefully organize each character in a reusable box with molded tray. This changeable letter set is also portable thanks to the tray.