Model created in Zbrush. It is watertight and ready for printing/milling. Although there are some slight undercuts, it was created with molding and casting in mind.
Inlcudes a 750 k polygon, decimated STL and a 2.8 Mil, quad topology OBJ.
Nominal size (although easily adjustable in any 3D software) is:
31.6 mm wide/ 40 mm tall / 3.5 mm deep/ volume: 1.21 cm3