This is an Oneida spoon ring. It appears to be a size 6-6-1/4. Hard to tell being a wraparound ring. I never wore it, I just thought it was pretty when I saw it at a store. Never exposed to smoke, perfume or scent of any kind. The thinnest part of the band is about 3/16" and the widest part of the ring is 3/4". 

I think it is a bit adjustable being a wraparound ring and not solidly joined.