What ring are you talking about? There are a lot of rings with the name legacy in it. If you could post a picture we might be able to help better. OR you could just call the experts themselves and ask them...
I think there is only one Legacy ring that is ''Celebration'' in style i.e. stackable type band ring. Is this it Tarzan?
I think your bet bet is just to email Tiffany from their customer support page on their website and ask them. I''ve done this asking for dimensions before and they''re really good about getting back to you.