I concur. In those days in any group of kids there was one "fat kid". That kid today would not look anywhere near so fat.
Cars were bigger then but my parents got all five of their kids into the back seat of a '57 Ford Fairlane. Try sitting five kids today into the back seat of a limo
I remember when a 180 pound adult male was considered BIG and a 200 pounder was ENORMOUS. It used to be a really big deal to be six feet tall, now it is not all that unusual to see a young woman who is six feet or six feet one. I see men almost every day who look like an average sized bear.