Ivenf 18" Mylar Emoji Happy Birthday Party Balloons Party Supplies, 10 Pack Set Bright color with super cute variety emoji pattern. Kids love it! Mylar helium gold balloons bulk. Made of non-toxic material. Easy to be inflated and stay inflated for weeks. Best decoration for an emoji themed happy birthday party, these adorable balloons are everything in the party. Double-sided. 18" diameter. Set of 10 pack (with extra 2 pack for leaking prevention).