4" Hippo Vinyl Sticker Decal Die-cut from high performance grade vinyl (no background) Can be used indoors or outdoors. Waterproof; Weatherproof. Size: 4" inches - Personalize with custom color Great to use on cars, walls, laptops, windows, mirrors, painted wood, metal or any smooth surface. Looking for a another size or something different? Contact us with your suggestions and we'll add it here on Amazon.