"Hey stefan, no idea about the most length achieved through pumping, but pumping does provide some permanent growth IF you’re dedicated to it. I’ve also been told—by a bio-man with a 13″ erection—that jelqing and hanging also work, and are more effective than pumping. I was at Dr. Meltzer’s presentation at Gender Odyssey and he showed off the now-famous photos of one of his patients who’s really into pumping. He’s got about 4 – 4.5″, and nice girth to boot." - Trans Man