The problem is once you get over 11x14 prices start climbing fast. I can get brand new 11x14 trays for $4.50 Canadian. They're Praff [IIRC]. Wouldn't hurt if they were a touch deeper but other then that perfect for me. 16x20 Praff trays are 4X the price. Over that size it gets worse. Other brands are much more expensive. Wouldn't be a big issue if I made a lot of big prints but when I mostly make 8x10s the cost of a set of 16x20 trays starts adding quite a bit to the cost of each print made. So cheap big trays for light use is a bonus for me.