I sew in an 8 X 10 area plus a wall of closet space. I have a cutting/ironing table plus the table for my sewing machine which is flanked by two book shelves, a small dresser for supplies and two quilt racks. I love my space. The only thing I wish I could fit into it though is the Sweet 16. Good luck with planning your sewing room, though I don't really think there is a "perfect size" room. It's not a "one size fits all" process.