Is my kitten going to grow up to be massive?

Your cat will not grow up to be a monster when it comes to size; there is some natural variation in the size of cats. Females are often smaller than males.

Female cats that get small litters do often get bigger kittens, so it might simply be that he has a head start when it comes to size.

The normal birth weight of kittens is 80-170 grams (about 3-6 ounces), and larger kittens will gain weight faster than smaller kittens will do. The normal weight for kittens at 8 weeks old is 650-900 grams (about 1.4-2 pounds), and male kittens can be up to 40% heavier than female kittens at the same age.

More information could be found in relevant articles, which were my references for this answer, about kittens' weight:

• at thecatsite.com;
• at askthecatdoctor.com.

Kittens grow fast, so it is not unlikely that your kitten is about 8 weeks old. I personally think the kitten is closer to ten weeks old, but this is not important; he looks healthy and beautiful.

To see how big your cat will be as an adult, you need to look at how big the parents are; the kittens will be about the same size as the parents when they grow up with some natural variation in size.