Hi Yosaiki! Thanks for this entry.
The idea of the bite out of the ruler is really cute, but visually I think it just comes across a little awkwardly. I'm also not sure I want to have a play on "rule" and "ruler" - it may connote too much about weight loss, whereas I'm more focused on overall health (weight loss is a part of that, of course).
If the ruler were integrated with the words, instead of just above them, it might work better for me? Not sure...
Thanks!