What is a healthy shih tzu puppy weight?

I have two week old shih tzu puppies. All checked out fine at the vet, all have been gaining weight steady.

They have doubled their weights and are big now!

My biggest one is 1.2lbs at 14days. Does this seem heavy? My smallest is 15oz.

Anyone know where I might be able to find a healthy shih tzu puppy weight chart?

you should be able to feel the ribs, but not see them