I am planning on getting my boyfriend a new car stereo and i am not sure how to go about it. Do you need to check the type of car it is going into versus the size of the stereo? Or do most stereos you can buy online and in the stores fit most or all cars (obviously not the huge LCD screen or anything, just a standard size ) So my actual question is...do i really need to pay attention to the year and car model or are the sizes pretty much universal? Thank you in advance for your answers!