This is an idea of a stackable drawer system. This is my first try to model something for a 3D printer. I hope that it is some kind of useful. It is 20cm wide, 15cm deep and so high like you want. All walls are 3mm thick. To build a full drawer system you need: 1 Bottom Part at least 1 Middle Part 1 Plate 1 Upper Part Drawers The plate is to place under the Upper Part to connect it to a Middle Part