“The wearing of the wedding ring is actually a goyish custom”
Actually, the Sefer HaChinuch writes that, while according to Halacha Kiddushin can be performed with any marginally valuable item, the custom is to utilize a ring. The reason he gives is that it serves as a “constant reminder” to her status.
While not a Psak Halacha, it does indicate that he considers it appropriate for a woman to ALWAYS wear her wedding ring! Certainly he does not see it as merely a “Goyishe custom”, and he was a Rishon.