Sorry, I see where there was too little information...
I'll have to wait until I get home to give you the exact size, but my daily driver is an '11 Impala, and its big enough to get the car in and open the doors, and have about 5 foot left in the front and back.
I don't care about ever parking the car in there, my vision is more of a shop area than a place to park the car.
My 4 yr old son and I both have roll around tool boxes, I have a Miller 180 Tig Welder, a grinder and a belt sander on a pedestal stands. I have an engine puller that folds up, and a engine stand. I've got about 10 jack stands. I have a metal table that I weld on, that I was thining about putting in the middle like and island??
I'll try and post some pictures of it how it is now...but its all just stacked in the garage now, I just moved in over the weekend.