Well, I know that with some of the litters of the wild little kitties that live on the edge of our town (the ones we catch, spay or neuter, and if they aren't too feral, they find homes for them), that there are such a variety of sizes, colors and fur lengths in the same litters, that it is amazing!! The one litter that I am thinking of right now, has one tiger with white paws(small stature), an orange and white who is husky and is going to be very big and is a shorthair cat. A charcoal gray and white with long fur and small stature. And a orange and white tiger stripe who is very petite and has short hair.... ALL the same Mama too! She is a "Tortie" and has brown, black fur mostly, and has white mitten paws, and is herself, a petite cat... So, yes, I do think they can be all sizes and colors in the one litter!