This can be frustrating for most so doing a blog about it seemed like a good idea.     Let's work with the right diameter first.  All body jewelry is and should be stated as the inside diameter of the hoop.  What you need to do if find yourself a ruler.  Using the mm part, place it from your piercing to the rim of your nose.  There's your diameter. That will give you a comfy fit without the hoop hanging down.  Many like to have a hoop that's a bit larger so just add 2mm to that to give you the...