Hippopotamus decals & stickers for cars, trucks, windows, & more in your choice of sizes & colors personalized. Apply custom hippo stickers indoors or outdoors on most smooth surfaces. Made with durable weatherproof sign vinyl that lasts for years without fading. You won't find better quality. Choose from Hippopotamus in water, cartoon hippos, a girl walking hippo, and more. Get custom hippo decals with no minimum to order and no setup fees.