Standard set of prototyping PCBs as far as I can see generally covers these sizes:
20 x 80mm
30 x 70mm
40 x 60mm
50 x 70mm
60 x 80mm
70 x 90mm
This is a set of 2 bins (A and B) to store them.
Can be printed on 12x12cm print beds.
There's also a version with ribbed floor, so if you fill a slot with only very few PCBs, they don't slide around as much.
Two reasons:
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Model generated in FreeCAD 0.21.2 using my parametric gridfinity template.
The author marked this model as their own original creation.