The best way to find out is to go to a PANDORA retailer and try on different bracelet lengths. If you have to measure your size without a PANDORA bracelet, you can measure your wrist using a measuring tape. The bracelet must not be too tight, as there needs to be room for charms, but it must not be too loose or it  may slide off   your hand.  A good way to determine the correct bracelet length is that you should be able to put a finger between your wrist and the bracelet.