How big was the creature hydra?

The hydra, a mythical creature from Greek mythology, is often depicted as a multi-headed serpent or dragon. Its size varies in different accounts, but it is generally portrayed as large and formidable, capable of terrorizing entire regions. In the story of Heracles, the Lernaean Hydra is described as having many heads, with some versions suggesting it could grow two new heads for each one that was cut off. While there is no definitive size, it is typically imagined as a creature large enough to pose a significant threat to heroes and warriors.