Board Thread:Questions and Answers/@comment-33636382-20171113044643/@comment-35710383-20180528025239

Someone wrote this on the TV Tropes wiki, in a list of examples of things that are bigger on the inside:

"The ancient towers from the Talse Uzer Stories. They are already big on the outside, but on the inside, they are about six times as big as Earth's surface. Just how big it is. Tower of God shows the huge scale of things inside the towers pretty well."

http://tvtropes.org/pmwiki/pmwiki.php/Main/BiggerOnTheInside

I don't know where they got this from.