Over the years we have ordered our t-shirt designs on a few different brands of shirts. We are currently in the process of streamlining our stock and moving all of our designs onto one brand of shirt, but this means selling out of the old stock of these designs before we can complete the change.
This means that we do not have one comprehensive sizing chart for all of our shirts, because measurements vary from brand to brand.
To be sure you are getting the right size shirt, we highly recommend you consult the sizing charts in the product photos for the design of shirt that you are ordering. The sizing charts in each of the product's photos are specific to the shirt that design is printed on, and will give you the most accurate measurements for that design shirt.
For our international friends, we present a Sizing Conversion Chart!
For assistance in determining your ring size, we recommend that you have your finger professionally sized by a jeweler.