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 250 k polygon, decimated STL and a 700 k polygon, quad topology OBJ.
Nominal size (although easily adjustable in any 3D software) is:
43 mm wide/ 50mm tall / 17 mm deep/ volume: 12 cm3
STL (Stereolithography, filesize: 11.9 MB), OBJ (OBJ, filesize: 50.4 MB)