Gracie Ruth is a skinny, lanky 4 lb'er and I get asked that a lot. I tell them she's just a small Yorkie and usually leave it at that. As shared here, many people really don't want the whole lecture and most truly mean nothing rude by it. If they continue the conversation or ask questions and I have the time I'll stay and chat some with them. You're going to have to perfect that "awww, bless your heart" look that us Southern Ladies use when dealing with people of limited intelligence,
as you are going to hear her referred to as much worse then 'teacup'.