The usual-ring sizing rules apply differently in this case due to the design and large dimensions of the Classic and Large Model Trinity rings. Cartier recommends that you select a size two sizes smaller than that indicated in the Cartier Ring Size Chart. For instance, should your usual size be 50, select a size 48 for these models.
The three bands of the Trinity ring are assembled in such a manner as to allow the ring to move easily and not catch. To reset the bands of your ring, roll the ring and set it down flat.