Probably good for a small car seat, but not good for a full size truck seat (ford f150). If it doesn’t drape over the edge of the seat by several inches, it rolls up under your butt when you slide into he seat. The tacky backing is good, but still needs to fit a certain amount for the tackiness to do its job. I’m a bit skeptical that it would work for smaller seats either. Even if most thinks this is a good size, I would prefer a larger size.