Andre the Giant. He was 7'4" and 520 pounds!!!! God DYAAAAAAAMNN!!
Here are some pics. Please share your memories and ask your questions in the comments area. And no..I don't have the answer to that one question. But it was probably huge! And I'm sure there's a quote about him somewhere that says, "Oh he was big alright. And the biggest thing about him (pause) was his heart."
And here's his Wiki page.