The table below is just a
guide. There are a number of other factors to also take into account,
such as how you as an individual like to wear your rings, the ambient
temperature when any measuring was done, (one's ring size can alter
dependent on how hot and humid the environment is etc).
The
real consideration that can catch people out when ordering a ring.
Is that the size you choose is also affected by how wide the ring is.
I make quite a few wider rings and to get the
same "feel" as "standard"
width rings you may normally wear, one usually has to have at least one
full size bigger.
If you are unsure, the best thing
to do is ask a friendly jeweller to measure your finger, with something
close to the width of ring you are wanting. Or you can arrange to send
an example of your size, which will be returned along with your order.
Check out this post for some tips
for getting the right size.
downloadable
ring sizer
(us sizes)