How to Measure Your Wrist
Measure around the slimmest part of your wrist, snug but not tight. Then add 1 - 2cm to get your bracelet length depending on how tight or loose you want it to be.
Your measurement will include the toggle (or clasp).
For example. If your wrist measures 16.5cm, you could select a bracelet length of 18cm.
If you are choosing a charm bracelet there will be approx 2cm extra chain on the end of the length that you select.
Another way to check is to measure the length of a bracelet you already own - make sure you measure the "done up" length that includes the clasp or toggle.
If you are choosing to have a toggle rather than a clasp and extender chain, it is important to get the measurement right. The same applies to multi strand bracelets as they have clasps without extender chains.