The size choices include US/Canadian sizes, Swedish Sizes (diameter measured in mm) and European Sizes (Circumference measured in mm). 

 I will ship it WORLDWIDE with tracking free of charge with UPS. Delivery time will depend on your location. I will send you an email with your estimated delivery date when you place an order. I accept returns up to 14 days after receipt of the item. If returning, you are responsible for the item until it has reached me, as well as for the return shipping charge. Please don't hesitate to reach out with any questions about the item, size or anything else, so that we can both be sure you will love your item!! I lovingly design these in Sweden, and want the recipient to be happy!!! To issue a return, contact me first!! The email is in the item description. Happy jewelry wearing!!!