Take a look at these as well. They are cheaper than H.D. and are 24x30 (still enough for 20x24 prints). Nice quality. I sized my under-counter location to handle eight of them, about 4.5" apart; they easily dry overnight without moving air through them (which I'm reluctant to do anyway as it can stur up any lurking dust when drying negatives on the over-the-sink wire at the same time).