I, E, J & K sizes are typical DIN dimensions, with allowances made for specific installation requirements.
Size S is a receiver with two standard shafts.
Size CG will fit in many GM and Chrysler oversized openings.
Size DD is a double DIN size that will fit in some Japanese vehicles.
Size T is a Toyota-only installation.
Our Outfit My Car tool will list your vehicle's size code, and show you exactly which receivers fit your vehicle. Knowing your size code will also help you shop for receivers in our catalog.