Well, in short, how many do I need? By looking myself today, I need 2 (1 7/8"for the trunk, and 3 (3/4"also for the trunk. Now, I have seen them available in all kinds of sizes from 3/4" to 1" to 1 1/4" and some don't offer more than 1.5". They also say you need typically 8 per vehicle and I have trouble seeing the other 3 needed, any tips or places I neglected to see? I'm thinking there is supposed to be one covering the seat belt holes or seat bolt holes maybe? Like some from the outside? It's been a while and even though the car is painted, it still isn't at my house so I can't readily go check.