Board Thread:General Discussion/@comment-32667203-20161226153141

Level 45 Tanks are 4 Tiles tall & level 1 tanks are 2 Tiles tall

4 - 2 ÷ 45 = 0.44 (I rounded it because the rest was infinite 4s)

Now, this is not probably not the diep.io size equation, i think this is the median increase rate of your tank 