Mardi Gras - Disco Ball Reflective Beads - 12pk The Mardi Gras colored beads are a great way to stock up on all the Mardi Gras beads you need. These disco ball beads are all about 6mm and come on a 33" necklace. The Disco ball beads come in a package of 12 with assorted purple green and gold beads. 6mm disco ball shaped beads in assorted colors. Enjoy!