All of our stickers are printed on high quality, professional and durable material, and are waterproof, weatherproof, and will last for a long time. They are all available in a 3" size. The measurement is taken from the longest side. For example, if it is 3 inches wide and it is wider than it is tall, the height may be less than 3". We stand behind our quality. If you have any issues at all, we guarantee that we will make it right and ensure your satisfaction.