I absolutely love this ring and the 18k rose gold color, but it no longer comfortably fits my finger.
Size is 48, which according to Cartier chart is 4.5. I bought a few years ago from TheRealReal- ctw .50, F, VVS2, and 4.8 g. Worn condition, the gold has scratches.
You know I'm not sure. In theory- another "box" shape could be added next to the Cartier logo or take out the square next to the Cartier w/o the diamond, but I have no idea if Cartier would do that.