Print-Ready 3D CAD Model Model is prepared for production, the reason why prongs may look a bit longer (it is useful for post-production and easily setting the stones)
Stone Sizes: 4x3mm, 5x3mm
US sizes: 4 - 4.5 - 5 - 5.5 - 6 - 6.5 - 7 - 7.5 - 8
6x4mm Ring is only in size 6.5
Each model was sized proportionally to the stones that it fits and has been built separately, from scratch, not just by being scaled. The same applies to the finger size variations.