He looks all Yorkie to me! Welcome to the forum
Who taped his ears? I don't really think that it's necessary with his young age, is why I ask.
Yorkies come in all sizes - in the origins, they used to be larger than they are now days. The great thing is that the larger ones have fewer health issues. Feeding has nothing to do with his size. Please feed him when he is hungry (there is no such thing as overfeeding a puppy, ok?).
Great to have you both here!