Anyone have information about what weight is proper at what age for kittens?

I have no weight chart, however I took my 12 week kitten to the vet and she weighed 3.3 pounds and the vet said that was a very healthy normal weight for a 12 week old female kitten. She is Siamese/domestic mix. Hope this helps.... I think you can look up a chart on the internet if you search for it as well.