Perfect condition as far as I can see. 

I'm not very familiar with ring sizes but the actual opening measures 18mm across.
It's quite a large ring and only barely stays on the thumb on my smallish hands.

Please message me if you have any questions!

Tracked postage:
UK: £3.45
Europe: £8
Rest of the world: £12

The prices are a bit high since it comes in a little box (see last photo), but I could leave this out if you wish and postage will be a bit less expensive. I'm also happy to send untracked at your own risk if requested.