【HUGE SIZE AND BEAUTIFUL BALLOONS】You will receive 40 inch big number balloons, also the package come with a straw for easily inflate and deflate. The large number balloons are prefect for birthday party or anniversary events decorations, which will make the celebration vivid and amazing. Birthday balloons can be combined as you like. Enjoy the DIY time to create your unique party!, 【DURABLE AND RELIABLE MATERIALS】Our number balloon birthday decoration are made of high-quality aluminum foil materials, silver color, gorgeous and personal. High quality embossed technology with neat edges that are not prone to explosions and leaks, is ideal for birthday parties. It is aslo a huge size and beautiful and unique color visual effects, which looks good when taking pictures. Make great photo booth props to hold when posing for photos!, 【QUICK & EASY TO DECORATE】The number balloons eliminates all the hassle of installation, it easy to inflate balloons and self sealing. You can manually inflate or deflate the decorations of birthday party with your mouth on a straw with natural air, or it will be much easier to use an electric air pump or a manual air pump. You can inflate it with helium, or just place them on the floor, bed and table, providing your party a good display. 【WIDE APPLICATION】The 40in number foil Mylar balloons are the best choice for girls boys kids & adults any birthday celebration, anniversary, graduation, bachelor party, marriage proposal, engagement party, wedding, bridal shower, baby shower, holiday celebration, business, big events, school class party, beer party, rock and roll party, Halloween or Christmas party decoration, New years eve, special event or various party celebration. 【FREELY COMBINED】 Number balloons for birthdays can be combined as you like, every anniversary is unforgettable, just buy the corresponding other numbers. You can stick balloon on the wall, sofa, mirror, window, door or garden. If you want the birthday decorations boy to float into the sky, you can inflate it with helium, providing your party a good display. Please avoid filling more than 90% of air or helium.