I inflate 3 Roomtex 24" balloons by mouth, to a big size until they get a nice neck. I'm surrounded by some huge balloons, and I use them to sit or lay on while blowing up the Roomtex balloons. I inflate the first Roomtex on the couch, the 2nd one while being on a GL500, and the last one while sitting and laying on a big squishy pink Belbal 36". Balloons in the video : 3 Roomtex 24 ", 3 Belbal 36", 1 GL500.