In as much detail as you can muster. What's the occasion, vibe, themes, and imagery you'd like to see? Is this an engagement ring or a sigil signet?
Do you have an extremely specific image in mind, or do you just want a ring with a cool sword on it?
Please understand I'm unlikely to take on commissions that are extremely outside the universe of my art style. E.g. If you want a cartoon dog I'm probably not your guy, but I'm happy to point you in the direction an incredible creator who is :)
I'll reach out for more information (including sizing) if I'm able to proceed with your request, but in the mean time the more information you can offer the sooner I'll be able to move forth.