I fold mine around the 6" x 24" ruler and then fold it in 3rds to fit the depth of the shelves. I got the cardboard flats from Hancocks for free and cut them the height I needed to keep the stacks divided. The reds and black and whites have been neaten recently but the pinks, etc haven't had anything done for quite a while. My shelves go from floor to ceiling with only room for my washer and dryer.