From my understanding and experience it is quite rare. When I'm fully erect I measure a little over 8 1/2" long and about 6 3/4" in circumference, and I've more than a few people assume I'm bigger than that, on cam and in person. I've also seen people on here boasting rediculous size claims when they're obviously no bigger than me....in many cases, smaller. One of these days I'll post measureing pics, but I've never been questioned, and honestly I'm not too wrapped up in it. I don't care if you're smaller, I don't care if you're bigger haha. I really don't understand why people feel the need to exaggerate....because really, what's worse than being caught in a lie? lol You are who you are, you have what you have. Make the best of it.