UPDATE: Add a set of print profiles with symbols printed to distinguish between the four grids.

A simple set of stackable trays with mini carry handles for easy pick up and transfer.

80mm x 80mm with 3 different depths: 12mm, 24mm and 40mm, suitable for holding small parts of different sizes. 

Can be stacked to save space when not in use.

Easy print, no support  structure needed. 

The original dimensions are 80mm square, if you need a larger size you can use the scale function in the slicing software to enlarge it. However, I would not recommend continuing to shrink the dimensions as the wall thickness of this model is designed for a two-storey wall. If you need a rectangular version, you may be able to use the individual scale function, but I haven't tested it.