I have only sold 2 and both were about 1,500 square feet so average size family homes. They both had 3 bedrooms as well. I updated the one to have a finished basement with a bathroom and 4th bedroom space as well.
A couple purchased a lovely condo that was HUGE. I can't remember the exact square footage but I could easily fit two of my 3 bedroom homes inside of it.
I don't know the exact number, I have sold a lot of homes over the years. I would have to check my files to get the exact number but I only ever sold one home that had 5 bedrooms and 4 baths so I am assuming it was that one.