I use the Official International Ring Size Conversion Chart at ringsizes.co
"Adore this shop, adore this custom ring! Well made, beautiful stones, solid copper, this piece is delicate with just the right amount of heft. I've purchased a few pieces from this shop and I've been 100% satisfied with every one of them. This ring is hands down my new favorite piece. Thank you!"
"I love my beautiful new ring. I originally ordered the small one and considered it too small so I wanted a companion and I ordered the bigger one. Now I stack them and they look beautiful together. I’m so happy. Thanks Marie for working with me. I highly recommend this vendor."
"Love this ring! Many thanks to Marie for her patience in working with me and helping me design this ring! Marie was amazing to work with and the details of this ring are spectacular! I love everything about it."