How large was Ancalagon the Black, really?

[Cloudhauler]

I know he was big. Very big, but I think this has gotten out of control with some claiming they calculate that Anc the Black was over 100 miles long. As cool as that sounds, it seems a wee bit exaggerated.

What do you guys think?
Is there a concensus on this?

 

[Elthir]

"Over" one hundred miles long?

Maybe some are thinking of Jörmungandalf

 

[Cloudhauler]

"Over" one hundred miles long?

Maybe some are thinking of Jörmungandalf

I watched a video where someone goes into the math of it and he makes his case that Anc was 137 miles long.

 

[Elthir]

Aha! Well there's the problem in my opinion.

Math has no business here