The wearing of the wedding ring is actually a goyish custom which serves no function since in our community married women wear distinctive clothing (head coverings) that serve the function of indicating if they are available.
Practically, since in our community almost all women gain weight shortly after marriage (when they get pregnant, which, Baruch ha-Shem, is routine among us), I doubt most married women could get their wedding ring on very easily unless they have it re-set (and since our rings are plain gold – unlike the goyim’s which are much fancier, that’s not too practical).