For reference points...the guy is Nick Nude. The girl on the left in the last clip who starts jerking off his dick and can't get her whole hand around his dick, that's Melissa Doll. She is listed at 5'2 and 98 lbs. If you ever see a clip of her performing, she is TINY. pirc is correct, not amateur.
Definitely not taking anything away from Nick Nude though. Guy is pretty thick.