I was looking in a crutchfield and for a 93 integra LS hatchback it says I can use 5 1/4" or 6 1/2"s. Is that true?

If so, can that be for all 4 or just the front. I have some good 5 1/4's that I'd like to put in there instead of the blown out stock ones.

 

It should say it at crutchfield; at least when I fill in my car's info, it said "Front: 6.5; rear: 6x9". If you still don't know, then pop off the door panels and check it out, if they are 5.25, then you can go ahead and install them, if not, then the worst that can happen is you pop the side panels back on.