What you get: 5pcs large cake happy birthday balloons(uninflated), 40 inches in diameter after inflation, each balloon has undergone rigorous testing to reduce the defect rate as much as possible. Easy to use: The balloons can be inflated with air or helium, so you just need to pinch the outlet of the balloon after inflation, They will seal automatically and will last for a long time; Please do not inflate too much gas to avoid exploding! (After inflated the helium, please pull the balloon with a ribbon to avoid the balloon being turned backwards) Good design: Three-layer cake balloon printed yay it's your birthday and candles patterns, combines birthday elements with different colors to make this large balloon more unique. Wonderful decoration: The happy birthday cake balloons perfect for decorating the babies, kids, adults birthday party baby shower, and the large size can well match with other party decorations. Will give you a fantastic birthday party, create unforgettable memories.