My dm is completely obsessed with appearance and in particular weight. I was overweight as a child due to a completely sedentary lifestyle: I wanted to do dance/gym but dm always said no as I was too fat (I wasn't huge).
There was no attempt to buy me nice clothes, and she'd buy only what fit regardless of whether or not I liked it, often making a big deal about the size she was buying.
I lost a huge amount of weight in my late teens and although I concede I have put on a bit (I've two dc) I definitely am not fat.
I've taken up running and have lost a fair bit of that and am nearly what I weighed when I got married 10 years ago. My entire body shape is changing too.
I needed a new top for a hobby I do and dm had spotted something she thought might be okay so bought it. I was grateful of course but it's huge on me: I tried it on for her and she refused to accept it was too big. She said there's no way I'm the size I am "these days". She comments on the fact I'm "bigger now". I'm a 10/12.
I spent my entire childhood feeling ugly and non deserving of looking nice due to my size and she's still at it. Suffice to say I have very little self esteem.
Why did she do it, and why does she continue to do it?