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: 34.65mm wide/ 43.30mm tall / 12.35mm deep
Medallion: 42.90mm wide/ 50mm tall / 12.40mm deep
If you need any more information about the product, please contact me, thanks.