There isn't a hard and fast rule. Instead, there are lots of ways to do this.Option 1: Wear your e-ring on your right hand for the ceremony. Move it back to your left afterwards (before pictures and reception).Option 2: Wear your e-ring on your left hand and have your husband put the wedding band over top of it. After the ceremony, take them off and switch them.Option 3: Don't wear your e-ring at all. Leave it somewhere safe or have your MOH hold on to it for you during the ceremony.Most brides I know have gone option 1 or 2, since very few brides probably want to take their e-ring off altogether. I slipped mine off and moved it on to my right hand partway through the ceremony, so that it wasn't in the way for the exchange of wedding bands.