Hello!
My name is Betsy we brought our Mrs. Walters home in March. She's a 4 and a half months and we are totally smitten. I've found the forum to be very helpful so far, so I decided to join so I could participate.
Not sure of the size limit, there used to be information about this but I can't find it. I typically downsize to 800 x 600 pixels, 75% quality, and that works well. Size is usually under 100 kb.