I don't have one anymore, but they're not much bigger than that. Maybe 2-3 inches bigger on the top measurements. I couldn't see the high cost anymore (it's the shipping more than the cost of the trays), and just went down to Walmart and cut down some plastic bins that were the sizes I was after. They come w/ lids too, which is handy. Cost was under $10, and all you need to do is lay something smooth on the bottom to keep the print from sticking to the bottom of the tank. The Patersons will break on the top lips if you mishandle them when they're full of chemicals or knock them about.