Count the ways to celebrate a birthday or anniversary with this Silver metallic Number 1 balloon. Mylar / Foil "one" shaped balloon is perfect to combine with our other number balloons to get the perfect number for your celebration. Helium quality. Balloon measures 16" long and arrives uninflated. WARNING: CHOKING HAZARD - Children under 8 yrs. can choke or suffocate on uninflated or broken balloons. Adult supervision required. Keep uninflated balloons from children. Discard broken balloons at once.