I used to have all of my sewing stuff crammed in our laundry room. Very small quarters! The day after our son moved out to his own apartment I started moving all of my sewing stuff into his old room. It is still not huge (about 12 x 12) but if it were any larger, I would only fill it up with more stuff. It is amazing how little time it takes to fill up a space!
I love having my own room for sewing!