Wow, just read through some of this thread and it's amazing the differences in clothing sizes, even enough some people are at/near the same height and weight.
I'm 5'4", weigh 186 lbs and can squeeze into my size 14 (US) jeans. I know I need a size 16, but I refuse. If I buy a bigger size then I might slack off on the dieting and get fatter (this has happened in the past).
I still don't understand why juniors and misses at the store vary so much in size. Like, I could be a size 14 in misses, but a size 18 in juniors. The style of clothing doesn't seem to be much different, so why the different sizing? Why can't one size mean the same wherever we shop?