I wouldn't say I was happy with my size, but I'm not unhappy enough to let it affect my everyday life. But it's only in the last few years, ie into my mid/late 30s that I can say that. I'm 5'2" and the smallest I've ever been in adult life is a size 12. I'm enormously pregnant at the moment, but pre-pregnancy I was a generous size 18, a 20 on top if the fabric wasn't stretchy 
So, I can confidently say, actually properly big and fat.
I'd like to be smaller for my health, it's not good for you being obese, and pre pregnancy I was well into that category. It's annoying not finding clothes that fit anywhere - combination of short and fat is really difficult to get anything other than jeans and stretchy tops/t-shirts - BUT it didn't ruin my life. Whereas being a size 12/14 a decade ago felt like the worst thing in the world. So, what changed? I don't know. But things I don't do are watch much TV, pay any attention to celebrity stuff, read women's magazines. I don't have any wish to appear attractive to anyone other than my husband, it just doesn't seem to figure in my list of what's important anymore. So actually I'm far happier on a beach now, in my gigantic size 18 swimming costume (and do remember how short I am
) than I was 10 or 15 years ago when I actually looked much better.
I don't know what this ramble is about, except to say that an acceptance of whatever you look like is possible, and (more importantly) that you don't need to be skin and bone to be worthwhile, or lovable, or acceptable. I wasted far too many years thinking like that - and thinking I looked like a beast when actually I was an attractive young woman and I wish I'd made more of that.