Large enough to hold 6 cartridges.
You may need to size it up by a small percentage if the default printing tolerances are too tight to take cartridges. I expanded it along the Z by 4 mm and widened it by 4mm as well, but this creates a tight tolerance that may not work well on every printer.
There are three versions of this model:
Lay on Back version
Stand up
Stand up with Logo
Logo (isolated from source)
The author marked this model as their own original creation.