This Cube Balloon Sizer Is A Box Template With A Number Of Different Balloon Sizes To Help You Get The Perfect Latex Balloon Size. The Sizes Include: 3 Inch, 3.5 Inch, 4 Inch, 4.5 Inch, 5 Inch, 5.5 Inch,6 Inch, 6.5 Inch, 7 Inch, 9 Inch, 10 Inch, 11 Inch And 14 Inch. To Create A 16 Inch Double Bubble, Insert An Un-Inflated 11 Inch Balloon Into A Clear 16 Inch. Inflate The 16 Inch Balloon To 14 Inch, Remove From The Template Then Inflate The 11 Inch Balloon Inside To 11 Inch.