I have 2 bedrooms that I use for sewing rooms. One is fairly large (about 16 x 20) and the other is smaller (maybe 12 x 15). I have 4 machines and a serger set up all the time in one room and a large cutting table and 2 bookcases for all the books and manuals plus a smaller set of shelves to hold my patterns. I tend to have lots of stuff and have managed to fill both rooms, plus the closets. You can never have too much room