According to the Adventurer's Bible Faligon is 11m from head to tail while red dragons are between 19-25m from nose to tail, in imperial that would be Faligon 36ft and Red Dragon 62-82ft
The height chart shows the red dragon standing besides a scale around 39ft and Faligon standing around 19ft.
Today's sketch is a study of a classical chimera, but the lion part is a pigeon, and also the goat part is a pigeon, and would you believe it the snake tail is also a pigeon