Would PSU be considered a very small university, physically-speaking?

I can't find much info on the average US college size in terms of acreage. Online I keep reading PSU is a big campus but when I compare it to other random colleges, PSU is much, much smaller, especially considering its number of students. It's apparently even smaller than San Francisco State University (50 acres vs 144 acres). The last time I was on the PSU campus I noticed it only seemed to scale 6 blocks or so.

Not that being small is a bad thing. In fact I kinda prefer it since I have a disability that makes walking long distances difficult. I'm just trying to understand PSU in comparison to your average American University- I guess(?) in particular compared to other public universities.

I'm assuming the vast majority of students being commuters is the reason why PSU can have so many students and such small of a campus?