Here is the super easy ring sizer that will allow you to check the best ring size for you before you buy or commission a ring from Milly Silver Studio. This is one of the easiest and accurate ways to check your size. 
 
There are other ways to check but I have found recently that some of these techniques don't always work out. So if you would like peace of mind that your ring will fit perfectly I would definitely recommend purchasing one of these affordable ring sizers first.