Considering how many times my foam board polish rack has fallen apart, I have decided it was time to upgrade from that cheap piece of crap to a real rack that I can actually use without the fear of broken shelves. My fiance and I built it out of wood and I stained it. It took about a day, including dry time and was in my area that next day. I absolutely love it. The shelves are four inches in width and have enough room for double stacking.