AFAIK, a cat should seem a little skinny by human logic. A vet can tell you more about how to tell, like how you're supposed to be able to clearly feel the ribs.

If your boy is visibly round, that's not muscle. A healthy cat is a straight line, or even slightly hourglass shaped.

To be sure, ask a vet. Cats are individuals, so it can vary.

Weigh him and consult with a veterinarian. Don't rely on random Internet strangers to determine healthy weight range for your cats.

looks fluffy to me. what's the vet say? go with that.

Is there a loaf photo?

Fat babies need the most attention.

pets dont feel body shame, its entirely human made concept.

He's just a big strong handsome chonky guy.

Responsible and tasteful comments :)

What a handsome guy. This is what I'd call an esteemed gentleman.

This is me kindly requesting more pictures!

Body shaming a cat... Now I have heard it all. Lol.

Not possible. Cats are incapable of feeling shame!