This is an US size 10, which is 0.78 inches or 19.81 mm in inside diameter. If you're a US size 10 then order this US size 10 by clicking on the buy now button above.
If you're not a US size 10 I can make this in any size in quarter sizes from US size 5.5 up to a US size 12; no extra charges. Just click the contact designer link on the right and tell me your size. Once I make it in your size, usually a few hours, I'll give you a special ordering link that you can then use to order this ring design in your size.
Sizes that have already been created for this design are,
US size 6.5.