ha ha i had exactly this conversation with my mate the other day at bluewater. i was after a new jacket (as all my ones from last winter are too big! whoop!) I went to H&M and tried on a 16 coat and it fitted!! whoop it was a bit tight around the bust but that was cool, but i decided not to get it, couldnt find much that i could afford anywhere else so thought id have a look in evans (humph) so anyways, i try on a 14 in a coat i liked...it was MASSIVE!! it looked silly, so then i tried a mac on in an 18 and it fits perfect!!! its so stupid, but i think as long as it looks nice what does it matter what size it is..
anyway im happy with my mac, its RED (whoop!) and was only £35!! Bargain! lol