I'm 5' 7", weigh 231 1/2 and wear a 16/18 in jeans, depending on maufacturer and can now get into an XL shirt instead of the 2XL I used to wear! Yippeee
I'm 201lbs, 5'7" and size 14. Sometimes (rarely) I find a 14 that is too small -- depends on the manufacturer. However, I am built top-heavy... when I went to get a bridesmaid's dress for a friend's wedding a few weeks ago, I measured as between a 20 and 20W dress size because of my rather large upper half!
I'm around 220 (my scale and I aren't on good terms since the holiday), 5'8 and 14-16 jeans depending on the cut, and at my max of almost 300lb I was a 24.
My sizing now seems kind of strange after reading some of the posts, but I think it's because I have a lot of muscle (ex-athelete, and still work out)...