ring
n. countable A2 Elementary Oxford US //ˈɹɪŋ// UK //ɹˈɪŋ// ring
n. a small circle of metal or other material that you wear on your finger as jewelry.
n. a circular band, typically of precious metal, worn on a finger as an ornament or a symbol.
She wears a beautiful gold ring.
He gave her a diamond ring when he asked her to marry him.
The ancient ring, passed down through generations, was a simple silver band whose true value lay not in its material but in its history.
Pitfall
a ring in my fingera ring on my fingerItems worn on the surface of the body use the preposition 'on', not 'in'. You wear a ring 'on' your finger.