Wear a V-neck top
It creates the illusion of a longer neck, which gives you a slimmer overall look.
Wear one shade or variations of one shade from head to toe to create a long (read: thinner) line.
Avoid pleated pants
No matter how thin you are, pleated pants add bulk to your middle, making you look larger.
Stick to straight-leg and boot-cut pants
They make legs look trimmer than tapered pants do.
Wear pants on the long side with heels
Cropped pants with flats can make you seem squat. Heels with longer pants have a longer, thinner look.
Go for jackets that fall below the hips
They lengthen and slim your body.
Try A-line skirts
They skim over your hips, smoothing lumps and making you appear more streamlined.
Wear proper undergarments
Too-small bras and panties that pull make lumps under clothes; underwear that fits well gives a smoother, skinnier silhouette.
Avoid baggy clothes
While you may feel like they cover your least favorite spots, baggy clothes actually make you look bigger than you are. Fitted -- not tight -- tops and bottoms create a thinner line.
Pay attention to grooming
The more polished and pulled-together you look, from hair to makeup to nails, the slimmer and prettier you'll appear.