Measure your wrist with a tape measure, piece of string or ribbon.   If you want to fill your bracelet with beads and charms, you should select a bracelet that is approx 2 - 3cm larger than your wrist,  If you only want to wear 5 or 6 beads and charms on your bracelet, you should select a bracelet that is approx 1.5 - 2.5cm larger than your wrist

Whatever you decide, you can change the look of your bracelet daily, matching it to your mood, event or surroundings.  Just slide the beads on / off your bracelet as you please