If you do not know your ring size, we recommend having your finger sized by your local jeweler.  We are responsible for sending you the ring size you ordered and cannot be responsible for determining your ring size. Some people wear their rings a bit loose, others a bit snug. The size is ultimately your responsibility. Due to the nature of the width of the Czernity ring, we have designed it for a comfort fit; so if you wear a size 6, order a size 6; but if you were a size 6.75 then order a size 7 and so on.  And don't forget our Czernity rings can be worn on any finger you like, even as a thumb ring.