I think, if you’re trying to enlarge your penis, Ballooning or Edging is Useless. It’s better to do some Squeezes, at least, while doing that.
Ballooning nor edging is meant for enlarging. They are both techniques for you to either last longer or become multi orgasmic. However, when you are ballooning and preventing ejaculation, your dick gets heavier and it expands a little bit. Is this slight increase permanent or just from holding back the ejac, I don’t know. But when your ballooning you do see a difference in size.