The classic PANDORA Charm Bracelet with a HEART Clasp... How LOVELY! Just thread on your favorite charms and you're set! Determining Correct Bracelet Length Wrap a tape measure tightly around where your writs is broadest and add 1.5 inches to the measurement to determine your bracelet size. This will ensure the bracelet is not too tight and will allow room for the charms to fit on the bracelet.