Green Frankenstein Monster Head Balloon. These foil mylar monster balloons are sweet, perfect for a little monster party or Frankenstein halloween bash! Size: 18"/45cm Additional Information: Made in USA Foil Mylar Self Sealing Valve Balloons ship flat (un-inflated) Helium or Air Fill Looking for more monster theme party supplies and balloons? Click here! ⚠️ WARNING: Choking HazardChildren under 8 years can choke or suffocate on un-inflated or broken balloons. Adult supervision required. Keep un-inflated balloons from children. Discard broken balloons at once. Foil balloons may conduct electricity. Do not use near electricity.