weight standards are mostly useless. muscle weighs more than fat, but is generally more attractive than fat. (sometimes you have those people that are just too buff)
I don't think everyone should look like a waif, and frankly, i'm not all that attracted to paris hilton...maybe she'd be cute if wasn't so erh...loose...but she's not "hot" in my book.
I'll tell you what i find attractive, and weight charts don't really apply. first, merely physically, I like a girl who's got the hourglass figure. nice hips and butt...she doesn't have to have a chest that pops out of her shirt. if your gut is woder than your hips I'm prolly not turning around to look back at you. but no guy wants a frail woman either. guys respond to women who are confident, flirty, and athletic. at least in my experience. if you're a little overweight, don't worry about it...if you exude confidence in yourself the vibe you send out that screams confident will override that little bit of chunk and your man will "see" you as looking better than women with better bodies who slouch or simply lack that aura of self confidence. A big part of how people perceive each other is in how they present themselves to others.
I can't speak for all men, but in my experience men want girl that looks like she takes care of herself, looks like she works out and they perceive to be confident and atheletic. You don't need a perfect body. No one really sees you exactly as you are anyway. no man's brain can retain every intimate detail of your shape exactly, and what we don't remember our brains pretty much just make up from our intial impression. it's not just whne checking girls out that we do this. everyone we meet, we "size up" in some context or another. we assume we know things aobut them just from our initial impressions.
case in point. I dated a girl in college who was a bit overweight, but she worked out a lot, and since she pretty much lived in my dorm room (didn't like her roomate, but did like me I guess), i saw her coming back from yoga, and aerobics and whatnot, and I felt like she was in great shape, because i was constantly being reinforced that she worked out and was healthy. now there' no way for me to know exaclt how healthy she was, but my perception was that she was, and even though she was a bit overwieght (5'6" and about 140), I just didn't really notice her belly until we broke up. I "saw" her as better looking than she really was because I liked her, she acted confident and energetic, and she talked about working out a lot.
I remember seeing her after we broke up and thinking she must've put weight on, but one of my friends looked at me like I was crazy, and said he thought she looked like she had lost weight--he said he heard she was trying to get in really good shape to get me back...but the drama is unimportant. he assumed she had gotten better looking, and I looked at her and thought she was worse looking. one of us had to be wrong, but in our perceptions, we were right.
so if any women are reading this, the key to looking good is as much in how you act as it is in what you actually look like. Be cool in who you are, take care of yourself, strive to be better--for yourself, not for someone else, and men will respond. besides if you do that you'll end up not just being percieved as cuter, but you'll find you'll prolly get in better shape with that attidtude than if you're just trying to impress someone else.