Find Your Ring Size

The following guide shows the ring sizes in diameter millimetres (mm) and the equivalent

USA/Canada sizes, and UK/Ireland/Australia and New Zealand sizes. 

MM           USA            UK / Ireland

15.9mm -   5.5               K  

16.3mm -     6                L  

16.7mm -   6.5               M  

17.1mm -    7                 N  

17.5mm -   7.5               O  

17.9mm -    8                 P  

18.3mm -   8.5               Q 

18.8mm -    9                R  

19.2mm -   9.5               S  

19.6mm -   10                T  

The best method really is to go to a local jeweller that you trust and ask them to measure your finger or if it is a gift you can take the ring of the person in to be sized using a jewellers ring sizer, and find the exact size that fits both snugly and comfortably.