This wedding ring guard has 20 round, channel set stones. Each band measures 2.7 millimeters wide. This ring guard has 1 carats total weight. It is made to fit a round solitaire from 0.25 carats to 1.5, or a princess cut solitaire from 0.25 up to 2, or a marquise solitaire from 0.5 up to 1.5 carats.