Oh, I had the same experience with my last litter. I had an ad in the newspaper and every call I got seemed like was someone looking for one that would grow to be only 3 lbs.

I just politely told them my puppies would probably be a bit bigger than that, you know like a normal yorkie

Just hang in there, you don't want your puppies in a home where their size is the most important thing any way!! It took awhile, but I have found homes for all my girls where they will be much loved whether they stay small or grow to be a bigger yorkie!!
What's really sad, is that someone will promise these people that the dog they sell them will be a "teacup" and them they will be disappointed when it isn't and the poor puppy will end up being rehomed or just not loved
Good luck finding wonderful homes for your puppies! I found homes for mine thru YT where people know better