I don't know. This ring is a size 6. I will say this, you do look small to regular built and I think the 6 would fit you,I personally think a 7 would be too big. But I don't know if you have trouble with swelling etc. Maybe you should go to jewelry store and have them size you, so you know for sure.
I am going to have some size 7 and 8 in the next month month and a half. So many people seem to wear this size and asking me to get them. I can let you know when I get them if you want?