Add a few numbers, flip the calculator upside and and voilà... instant laughs were had in your 5th grade math class. This tongue-in-cheek throwback Calculator PVC Morale Patch is here to appeal to the side of you that never grew up with a little fun irreverence. The 5318008 Calculator PVC Funny Morale Patch is made of durable rubber. "5318008 Calculator" is hook-backed so you can attach it to any loop or fuzzy surfaces like a car headliner, military backpack, military gear, patches for jackets, or your favorite patch wall, and measures 3.5″ by 2.75″.