I found wrapping my fabric around a ruler and then folding keeps it a consistant size for easy stacking. My shelves are custom made by my hubby in his cabinet shop. They are 15 inches deep. I use plastic boxes that fruits and veggies come in for charm squares and jelly-roll sized strips that I cut from scraps instead of storing a bunch of loose scraps. Zip lock bags on the bottom shelf store some pieces of fabric combinations that I've already made things with that I want to make throw pillows or wall hangings with and wasn't ready to cut into my storage sized smaller cuts.