oh dear---now I'm telling on myself----I left about a 3" space when I got a new cabinet for fabric.....They stand between the cabinet and the wall---just rolled in and stacked....nothing in a "marvelous" way....just in there...it works for me.....
I sew in about 1/3 of a bedroom---Two tall cabinets, two sewing machines in cabinet (Betina Bernina and Phoebe Pfaff) and a cutting table, 40" x 4'----on two bookcases and the table in in front of a north window 5' x 5'. Happiest place in my world!!!