I have some 11 inch balloons and a foot pump inflator. I'm going to inflate these balloons until they pop! Are you ready? I stretch out the balloons by hand first, then begin inflating them. They quickly inflate with each pump. Before you know it, they are huge, and ready to burst at any moment. Inflated to the max. Nice long neck crystal balloons. This is so much fun!!! I inflate both regular 11" crystal balloons, and two printed Happy Birthday balloons.