Circus Self-inflatable Mylar Balloon Assortment (12 Pack) - Balloons & Printed Balloons Simply smash the packet inside the balloon to activate the inflating action. These fun circus balloons are the perfect addition to your carnival themed party decorations and supplies! (1 Dozen Balloons) Each includes an 8" plastic stick. Deflated, 5" - 6 1/2" x 5" - 6". Assortment may vary.