Smaug Size Chart by SyndarilArt on DeviantArt

Glaurung - the Father of Dragons by WretchedSpawn2012 on DeviantArt

How Powerful Are Tolkien's Dragons? Scatha, Smaug, Glaurung, Ancalagon the Black

How big do you think Darkstalker to be?

Smaug on the LOTR Dragon size chart The hobbit, Middle earth, Lord of the rings

dragons - What does Tolkien say about Ancalagon's physical appearance, especially his size? - Science Fiction & Fantasy Stack Exchange

Glaurung by YellowPanda2001 on DeviantArt

The Nerd of the Rings on X: Smaug and Glaurung were based on real dragons Tolkien encountered when he gained access to a secret civilization of dwarves who domesticated the creatures. Here

Glaurung and Nienor - Every Day Original

Glaurung, an art print by Ash Blender - INPRNT

When you find out how big Ancalagon was