Specifications: Made of non-toxic and harmless material, strong and durable, supports helium or air without tearing or bursting after inflation. Happy Birthday letters shape balloon for both indoor and outdoor use. Perfect meeting demands from balloon decorators, event planners, birthday parties, special events and etc, lets you celebrate special moments with children, friends, and family. Item Name: Happy Birthday Balloons Set Material: Latex Features: Inflatable, Party Supplies, Birthday Gift Balloon Size: Latex Balloon: 4.72cm/12" (Approx.) Happy Birthday Shape: 6.29cm/16" (Approx.) Heart/Star Shape: 7.08cm/18" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Set of Happy Birthday Balloons (Other Accessories Not Included.)