Not many women can wear a garment right off the store rack and have it look immediately fab. Even the models stomping the runway with their "perfect bodies" had the garments fitted to them. Clothes are cut for a "standard" size but every body is different. It would be an unrealistic expectation to think that most things you purchase off the rack (unless you find a designer who's clothes are cut for your body type) will fit you perfectly, immediately. A key to looking your best and making a garment look expensive is fit. and to make your pieces fit you, become best friends with a tailor. Buy the size that fits the best (forget what the tag says), and get your new bestie to "make it work.