Hmmm..
I'm not really sure how i came to my magic number. I'm not too bothered about the scale i'm beginning to realise that inches matter more as this is what people can see and as for the scale..that's my secret(excuse the ticker

).
I've always wanted to be size 12..i don't know i just see it as a normal average size esp since i'm 5'8 and i think 10 stone 7/ maybe 11 stone will be an ok weight for me to get into those jeans anywhere with the size 12 label on them!! I also remember just going out with friends to buy clothes and realising this was the normal size.
My friend's are all much shorter than me so i can't really compare, but there was a time i remember when i lost lots of weight just by changeing my group of friends i use to hang out with and i put on my size 12 jeans and they were so loose and comfy, and my stomach was soooooo flat. I don't know where those jeans are now but i would love to have that feeling again.
I also don't bother with the BMI thing, i KNOW my body and i KNOW what looks good on me.