If you're a glasses wearer, you know that the frames can completely make or break your look. We get it! They may be essential for your eyesight, but they're an accessory all the same. So choosing correctly is extremely important.

There are lots of factors to base your choice on, including your personal style and coloring (eyes, skin, hair) -- but perhaps the most universal is your face shape. There are five basic shape categories that most of us fall into. If you don't fit one perfectly, go for the one that is closest to your shape. As with any body feature, there are all kinds of variations.

For those with a square face shape, be sure to avoid glasses with hard lines that might make your face look boxy. Co-Founder and Co-CEO of Warby Parker Neil Blumenthal told us that "a frame that is wider than the widest part of the face helps to balance the proportion of a square face."

Heart-shaped faces, those with a chin much thinner than their forehead, need to find shapes that balance the width of their face. Blumenthal suggests trying to "minimize width at the top of the face" by choosing frames that widen at the bottom. Oval faces are the luckiest, as they can pull off almost any style. You may want to balance the curve of your face, so choose square, rectangle or upswept glasses to balance your face.

Oblong, or long face shapes, will see much more length than width. You'll want to choose frames that are larger, to break up the length of your face. Those with round faces will want to choose frames that add angles, are structured and slim. Lenses that are wider than they are deep, as well as those with dark frames help define a round face.

A final thought -- and all-around good advice -- Blumenthal told us that "for eyewear in general, juxtapositions work best: the more angular your features, the rounder your glasses should be and vice versa."

Click through the gallery above to see more on which glasses you should choose, and some options we've selected for each face shape!

Photo Credit: Getty Images