Size To to Feet

[Great Wyrm Lord]

Does anyone know where one can find the size a creature that is Fine to Colossal in actual feet?

Like a Medium size character be around 6 feet tall, but how size would be a Large or Colossal size be in feet?

Anyone known where such information can be found?

[David Thomassen]

In the Description of the Monster eg Hill Giant 10', Frost Giant 15', but both are size Large. Storm Giant 21' & Huge