Try asking him?

He wants to buy you jewelry

Good luck to you girl

Ring ring ring he wants an eternity thing

Marriage possibly or promise ring

Could be an engagement ring. Or maybe he is buying you just a ring you will have to wait & see. If he doesn't produce either then I would definitely explain gently that question is not a question a guy should spring on a woman unless he is buying her a ring.

The size of the 💍

He wants to know what ring size you wear