School Campus Property Rule Signs from School Fix® allow you to post school property rules clearly around the building with high visibility campus rule signs. Quality and durable construction, signs are .063” or .080” thick commercial grade aluminum. These signs have integrated U.V. inhibitors to resist fading and stay looking new. Each sign has 5/16” pre-drilled holes for a hassle-free installation. Choose from our most popular designs. Sizes available as a 12” x 18” or larger 18” x 24” aluminum sign.