I'm 5'3" and was squeezed
tight into a 20W in JCP sizes, and a 20 in Old Navy khakis. I thought the khakis fit (those were the "perfect fit" ones before they put stretch in them) but my thighs were rubbing together so badly they actually split in the thigh seams entirely after a week at
Disneyland, while on the plane out to Orlando (bi-coastal trip), and I had to throw them away.
I was in XL shirts mainly, though I had a polo type that was 2X. Now that I think about it, I was stuffed into some of the XLs.
(the frowny face is not at the size, but at how I was jamming myself into them, without realizing I should do something about it OR go up a size...I dressed really really terribly for several years, out of denial and self-loathing, and it makes me sad I was so awful to myself)
I'm medium currently. What's left of my tummy is keeping me from being comfy going lower than that. 40DD at the start and now I'm 38 C but actually I think I'm 36C at this exact moment. The clothing-replacement budget is hard enough without including the regular bra purchases; remeasuring and buying smaller bras that fit perfectly is going to have to wait.
I wore my new shorts today and didn't think they would go on as I put my foot in, but they were just fine. Still stunned.
I keep saying it's like magic.
I had to figure out what worked best for me and then I just kept going. Had my first gain fairly early on, survived it, kept on going. (gains still make me wince, but you just deal and keep on going) I weigh all my food that can be weighed; only oils and beverages including half/half get measured. I'm careful. I jog now. I do strength training now. I've been doing WW since Feb 2012.*
Hardly magic when you lay it all out like that.
But still, seems like magic.
And it can work for you, too.
*(well, I don't track when at Disneyland/world/Universal, but the things I want to eat are very very different than what I used to want, and the amount I can eat has changed dramatically)