diamond round 4.5 mm --> 5.0mm
diamond round 6.0 -> 6.8 mm https://www.cgtrader.com/3d-print-models/jewelry/rings/tiffany-rings
diamond round 5.0 mm -->5.8mm https://www.cgtrader.com/3d-print-models/jewelry/rings/solitaire-rings-tiffany
diamond round 7.0mm --> 8.1mm https://www.cgtrader.com/3d-print-models/jewelry/rings/tiffany-rings-10afa3d1-caa5-4384-87c1-e4071ddf8dae
diamond round 10.0mm https://www.cgtrader.com/3d-print-models/jewelry/rings/t-2e5dcf2e-4ff4-4922-8aba-b2f391068288
If you need to change the size of your finger or anything. Message me for help