Hi Mamie
My answer of CHIN did not assume the wording should read 3 centimeters and not 30, it was because I hadn't read the question correcty.
On reflection I made a second suggestion that "lower lip" could mean a cows lip i.e. the lip of an animal that low's (moo's). Whilst I am not fully au fait with animal biology I would suspect that there is a better chance of 30 cent.
being appropriate.
???
JimB
Regards