Nah, here's the biggest corn snake ever seen... bearing in mind that I'm 5'9":
Yeah, I know... some people are sick of that same pic.

He's 67 inches, by the way, or 5'7" for the non-mathematically inclined.
As for corns having "too much space"....... Ummmm.... no. In my experience, corns are NOT nervous in open spaces, and in fact will use every square inch you give them. I had a corn in a 6' cage, and he used it, believe me.