Levels of Tumblr.

1 follower = egg

10-40 followers = hatchling

50-99 followers = baby dragon

100-349 followers = dragon

350-500 followers = still a dragon

501-799 followers =  mega dragon

800- 4,999 followers = super hella dragon

5000+ followers = UNHOLY OFFSPRING OF LIGHTNING AND DEATH 

These are the legit numbers.