It is watertight and ready for printing/milling. Although there are some slight undercuts, it was created with molding and casting in mind. Nominal size (although easily adjustable in any 3D software) is:
Pendant: 33.50mm wide/52.40mm tall / 9.94mm deep
Medallion: 44.85mm wide/ 60mm tall / 10.70mm deep
If you need any more information about the product, please contact me, thanks.