What you needButton, Craft wire and Jewelry pliers.
Step-1: Cut a small piece of wire, around 6-8 inches should work. Make a small loop on any one side of the wire. Circle the wire 1-2 times around the loop to create a twirl pattern.
Step-2: Insert the open end of the twirled wire into a hole of the button. Bend the twirled part upwards and fix it below the button hole, on the front. Again insert the open end through the other button hole.
Step-3: With the remaining wire create a big loop and coil the rest of the wire below the big loop. Cut off extra wire if needed. Attach the pendant with a string or chain and enjoy!