Model created in Zbrush. Watertight and ready for printing/milling. Although there are some slight undercuts, it was created with molding and casting in mind.
Model available with and without the halo. Each version is provided as a highpoly OBJ (2 Mil polygons) and as decimated STL (around 700k polygons).
Nominal size (although easily adjustable in any 3D software) is:
Version with halo: 49mm tall / 31 mm wide / 7.7 mm deep / VOLUME: 3.1 cm3
Version without the halo: 42mm tall / 31 mm wide / 7.5 mm deep / VOLUME: 2.65 cm3