If you are unsure of your ring size, I have included two ways in which you can measure, as well as a conversion chart below.
The first is to measure your finger, I find the easiest way is to wrap a strip of paper or string around the chosen finger, marking the point where the string meets (remember to ensure there is enough clearance for the ring to pass your knuckle). Measure this in millimetres, this will give you the circumference of your finger which you can then convert using the table below.
The second method is to measure the internal diameter of an existing ring in millimetres, which can also be converted using the table below. Please ensure that you measure through the centre (widest section) of the ring.