I always amazed at just how big the Saturn V really was. I remember watching most if not all the launches on TV and just found that machine mind boggling and still do. I got the opportunity later in life to stand next to the one in rocket park outside Johnson Space Center when I was woking in Houston (not for NASA), never quite got over how big the engine cluster was in real life. Anyway, heres a comparison chart.
http://www.universetoday.com/118742/the-worlds-rockets-to-scale/
http://www.universetoday.com/118742/the-worlds-rockets-to-scale/