Holey 17 Hole Box Balloon Sizer can be used for measuring balloons. The sizer is a collapsible cube with 17 different sized holes. Balloon Sizer folds up completely flat, perfect for transportation and storage. Available hole sizes are: 14", 12", 10.5", 9", 8.5", 7", 6", 5.5", 5", 4.5", 4", 3.5", 3", 2.75", 2.5", 2.25" and 2".