Here is an easy guide to finding what your size is for your future rings, bracelets, and anklets.
How to find your ring size:
Make sure to tighten the sizer after your knuckle for a more accurate size.
For the double digits on the ring sizer, here is a break down:

How to find your bracelet size:
Once you measure the size of your wrist, measure it again, but add a finger in place to get the new size. This way, your bracelet won't be too tight or too loose.
How to find your anklet size:
Once you measure the size of your ankle, measure it again, but add a finger in place to get the new size. This way, your bracelet won't be too tight or too loose.
How to find your nose ring size:
Measure from your hole piercing to the edge of your nose to find the right size.