Size:25 No. | Color:Goldenfoil balloons measure about 16 Inches and arrives deflated in Pack of 2 which can be filled with Normal Air or helium gass. Give your big party a personalized presentation with these premium quality Foil Balloons! This collection of metallic balloons features special numbers for your special occasions. If you want to form other special numbers than has numbers from 0 to 9 so you can mix and match to form any number. Whether you're celebrating a big Brthday graduation or anniversary these shining Foil Balloons are perfect for your celebration. Mix and match with coordinating foil and latex balloons polka dot balloons & balloon accessories for a custom party theme. Can be used multiple times convenient inflation and deflation! Use a medium width drinking straw and insert it into the self-sealing valve of the balloon. Once you get to the end of the sealing valve you will here a puff of air escape. Then slowly push the air out of the balloon.