Here is my foster kitten pile. All are about 6 weeks old and almost all eating solid food. I was asked to raise some 4 week old ragdoll kittens who are larger than my older kittens.
Here is the smallest of my foster kittens. She can fit in your hand and weights less than a roll of toilet paper. We call them the teacup gremlins. They are feisty tiny kittens who did not get colostrum. In spite of that they are thriving and growing , slowly.