ちちくらべ ! Chichikurabe! It's fun to say.
I've never had to think about my characters in this manner before, but there is a lot of numbers and proportions I had to get just right if I wanted this to be accurate. So here they are, with height listed on top, and... the other one at the bottom.
The Japanese font is Gachapon by Maniackers [link] The words are just the characters' names, but I wanted to do it this way for a change.

UPDATE: Couple of mistakes, nothing noticeable without scrutiny but I fixed them anyway.