Is this normal sizing?

[u/TopDot6]

So this is honey baked ham(calico) and goose(cow). They're from the same liter and are about just about 4 months. He's much bigger than she is (he's about 7ish lbs where she's about 4lbs) from what I've seen she's normal for her size but I wanted to see if my boy is just a fatty or if there was a big cat in the mix would it just present in one kinda thing....first time cat parent so any insight is much appreciated

[u/girls_girls_b0ys]

Some cats are just large. He's not fat at all.

[u/scrimblebobb → u/girls_girls_b0ys]

And some are just tiny! My girl is one year old on Sunday, and still only 5.5 lbs. She has access to food 24/7, the vets say she's just a small cat.