I know they have them for woman but i havent seen one forcats and dogs .
Im the kind of person that sits here thinking " i wonder how big they are now "
and also I want to be able to tell people that "no there only the size of a pee you cant feel them yet *
I can't find anything on the internet either, however in all of my cat books they have diagrams and explanations on their size at each week so perhaps you could go to the local library and check out their books. Good luck.