X4 Beer! Cheers! Mug Foam Large 23"X16" Foil Balloon! Party Birthday Dad 

I opened one package to measure.  Not sure that the measurement is exact, but close.  This is larger than a standard 18" foil balloon.
You get 4 balloons.

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.