It is important that you get a correct measurement when ordering your jewelry. Measurements include both magnets. When you measure your wrist or ankle, you do not want to take a tight measurement. You must allow for some slack in the measurement. You do not need to wear the magnetic clasp directly against the skin in order for it to work. It is better for it to be a little loose rather than too tight. If an anklet or bracelet is too tight, you run the risk of losing it when you flex and open the magnetic clasp.
We suggest wrapping a piece of string around your wrist, allowing as much slack as you;d like your bracelet to fit (we suggest a finger or two between wrist and string), and measuring the string against a regular ruler.