Do all brands of bubblegum blow the same size bubble?

No, all brands of gum do not make the same size bubble. Some brands of gum are Chewing Gum, such as Orbit, Juicy Fruit, and Wrigley. They still blow bubbles, just not nearly as big, and you have to be chewing multiple pieces to blow a bubble. Other brands of gum are bubble gum, and they are specifically made to blow bubbles. Some of these brands are Double Bubble, Bubble Yum, and Bubblicious. Most of these blow the same size bubble, but I'd say the biggest bubble is Bubblicious, because their pieces of gum are so big, and they are soft. Usually, the softer and bigger the piece of gum, the bigger the bubble