I’ve debated whether to answer this or not, because I really wasn’t overweight as a kid, but my mother treated me as though I was. I was a sturdy kid - muscular, and larger than my siblings - but I absolutely wasn’t fat. However, my mother absolutely obsessed about my weight (and mine only,) making me grow up thinking I was fat.
In hindsight, I recognize that my mother truly wished that someone had educated her about nutrition and helped her with weight control when she was a kid, and she was projecting that on me. What she viewed as “helpful hints and mindfulness,” though, came across as nagging and criticism… It was really common to hear the question “Are you sure you really need an extra helping?” at dinner time - directed only at me. My brother could and did eat like a field hand, and looked absolutely emaciated through most of our childhoods. Even if I had been engaging in the same strenuous activities as my brother, he was encouraged to eat more and more, and I was encouraged to watch my weight. (To be fair to my mother, yes, I did tend to put on more fat than my brother. But to be fair to me, this became the dinnertime refrain more and more as I was becoming a teenager - when I was supposed to be putting on more body fat!)
As a result of the nagging, I became the kid who sneaked food, felt fat, and felt terrible about myself. I look back and realize now that I was a normal, healthy weight, even though I wasn’t a size zero. A muscular size 10 - which now seems to be called a 6 or 8, thanks to vanity sizing in the women’s fashion industry - not supermodel material, but at my height, absolutely healthy. Yes, I was larger and weighed more than my sister, but I was also 7 inches taller, and just overall built larger! (Her - 5’2", 105 to 110 pounds. Me 5’9", 140 pounds. She was a ballerina. I played drums in the marching band and moved furniture for my after-school job. Yeah, I felt like a huge blob when compared to Miss Tiny and Perfect!)
Fast-forward to now: I have two children at home who are old enough to be aware of their weights. My son is overweight. My daughter isn’t. As a result of my own sensitivity about how my mother treated me as a kid, I try not to nag about weight. My son realizes he weighs too much, and I try to cook healthy meals and keep healthy snacks around, and I don’t buy soda. I also don’t let my daughter tease the boy about his weight - home should be a place safe from attack and bullying. All I can really do is model healthy behavior - I can’t manage my son’s weight for him…