Square
A square-shaped face means that the width of your fore-head is in line with your cheeks and jaw. To soften the lines of a square face, round or oval frames are the best.
What to avoid: square shaped frames that accentuate angles of the face.
Celebrity Examples: Demi Moore and Brad Pitt
Oval
Those of you with oval faces are particularly lucky – they can where most any shape sunglasses. Experiment with all the latest trends from oversized to colorful rimless shield sunglasses. Read my final suggestion at the end of this article to learn a good way to get cheap designer sunglasses soyou don’t break the bank on an accessory.
What to avoid: Frames that are too large for your features (good advice for most face shapes).
Celebrity Examples: Jennifer Anniston and Tyra Banks
Oblong (aka rectangular)
Oblong or rectangular faces are about the same width at the fore-head and right below the cheekbones. They might have a high fore-head or a narrow chin. Large square frames are the best help even out the proportions of your face.
What to avoid: Short frames that accentuate face length.
Celebrity Examples: Gwyneth Paltrow and Denzel Washington
Round
A round face has a width and length that are nearly the same. Wide cheeks give an overall circular appearance to the face. You should go with square shaped sunglasses to balance out a round face.
What to avoid: Round frames that make your face look rounder and large frames that shorten your face.
Celebrity Examples: Christina Ricci and Jack Black
Diamond
Narrow at the eye-line and the jaw-line with a small fore-head and chin. Angular features with dramatic cheekbones.
What to avoid: Narrow frames that draw attention to narrow eye line
Celebrity Examples: Madonna
Heart
On a heart-shaped face, the fore-head is the widest part of the face, generally accompanied by a small pointed chin. Aviators with rounded upper corners are a great choice for a heart-shaped face.
What to avoid: Top-heavy styles that draw attention upward, as well as sunglasses that sit tight against your cheeks.
Celebrity Examples: Jennifer Love Hewitt and David Spade
Triangle
The triangular face is essentially the opposite of a heart-shaped face – narrow temples and cheekbones, and a dominate jaw. You should go for a pair of sunglasses that will balance out your face. Oversized oval frames and medium to large aviators are good choices.
What to avoid: Narrow frames that are out of proportion with the rest of your face.
Celebrity Examples: Kathy Ireland and Keith Urban
Final Suggestion
Sunglasses are a great tool to transform an outfit. They add the type of pizazz that traditional shirts and pants cannot. The problem is that if you want your sunglasses to match your $200+ bottoms and equally expensive top you have to drop the same if not more for a designer brand. My approach is to get some cheap designer sunglasses such as DG Eyewear, VG Sunglasses, or Princess Couture shades that closely follow high end labels, but for a fraction of the price. That way you can have a large selection of frames for any occasion that will make all your outfits just that much more versatile.