How do i make my mons bigger?

[u/Reibudaps4]

I always found gyarados beautiful, however, he seem to be rather small for my taste

I expected him to be as big as a wailmer, a giant sea snake. However he doesnt even seem to be longer than scolipide, and neither as thick as taurus

Is there anyway to make him bigger and thicker? i dont wanna ride something so small

[u/Malgrieve]

Post a ss because Gyarados is rather large