Our decals are available in sizes from 2" Tall or 3" Wide (Helmet/Hard Hat Size) up to 30" and sometime more! You have the option via the drop down list to choose from regular vinyl or reflective vinyl. Regular vinyl is your standard, everyday window decal material that you see on most peoples cars and trucks. We use a high performance, 5-7 year outdoor vinyl for all of our decals and each decal has a coat of UV Laminate over the top, which extends the outdoor life and protect it from UV, scuffs, etc. Reflective vinyl is the highest performance 3M material on the market today. This material also has a coat of UV Laminate over the top, which extends the outdoor life to roughly 10 plus years if taken care of properly. This material shines bright when the light or flash hit's it. It's the same material you see on most school buses, police cars, firetrucks, etc. Reflective vinyl does cost more, but is so well worth it in the long run. Once you go to reflective, you generally don't go back to regular. The standard size for a helmet or hard hat is 2" tall or 3" wide. The standard size for window decals is 4-5" regular vinyl. Our graphics are printed on the highest quality, exterior Non-reflective and Reflective Material on the market today. Generally, each item has a layer of "Clear" application tape over the top of the decal to assist you with proper application. Once the decal is applied to it's chosen surface, the "Clear" application tape must be removed. This is a very important step that many customers forget. Each item is made to go on the OUTSIDE of your vehicles window, the body or bumper of your vehicle, your helmet or hard hat or any other flat surface. The vinyl is NOT made to go on drywall, clothing or wood.