Common question, but to be honest, it all depends on lots of factors!
*what shop you're in - dress sizes vary soooo much in each shop, eg: you could be a lovely size 10 in Next, but a 12-14 in Miss Selfridge!
*what shape you are - you could be a size 10 in jeans, but if you've got big boobs (like me!) then you'll still have to buy a 14 dress to accommodate them and get the waist taken in! So I guess it depends on how curvy or slender you are when you reach your target. And remember - if you used to be really slim - you may not return to that same shape - age + gravity interferes with that one!!!
*if you exercise - if you start toning up or increase the amount of exercise you do, then muscles weigh more than fat. Therefore, you could find that you're wearing smaller sized clothes (because you've toned up and your shaped has turned lean 'n mean!) but the scales may put you up a few pounds because of the muscle density. Have I lost you yet?!
That's why muscley-bods may weigh lots on the scales, but have hardly any fat cells to speak of! Pure muscle!
I'd say don't be too aware of what the scales say or the label inside your clothes - go by the way you look & feel. If you're happy with how you look in the mirror and feel fab, the other stuff are just numbers!
Lainey xx