Was just thinking about when my daughter first went off to college. She and a friend shared a very small room and tiny bath. To store their personal toiletry supplies, I made them a hanging storage, for the back of the bathroom door. It had various sizes of pockets (roomy pockets, with elastic at the tops), to hold anything from TP to a hairdryer. You could fashion a similar thing, for your sewing supplies. Theirs was held up by two "over the door" hooks.