It's officially summer, which means your sunglasses are about to be the hardest-working accessory you own. And yet most face shape guides read like geometry homework. Here's the no-BS version: one principle, five face shapes, and the exact frames to shop, all under $50.

The one principle that actually matters

Contrast flatters. Angular faces look best in softer, rounder frames. Softer faces look best in angular frames. That's most of face shape theory in two lines. Everything below is just that principle applied, plus one more truth: if you put on a pair and feel unstoppable, that's your pair. Confidence beats geometry every time.

Not sure of your shape? Pull your hair back, look in a mirror, and trace your face outline with an old lipstick or just your eyes. Widest at the cheeks and soft all around is round. Strong jaw and straight sides is square. Longer than it is wide is oblong. Wider forehead with a pointed chin is heart. Balanced all over is oval.

Round face: go angular

Your best friends are straight lines and sharp corners, which add definition.

Silver Screen Sunglasses ($35). Striking square lenses in sleek silver block frames. Instant structure.

Purrfectly Chic Sunglasses ($40). The upswept cat eye lifts and sharpens soft features. Navy or tortoise.

Golden Noir Sunglasses ($40). Black lenses in chic gold detail, sleek enough to add angles anywhere.

Square face: soften it up

Your jawline is the statement, so let your frames play the smooth counterpart. Aviators were made for you.

Demure Aviator Sunglasses ($40). Gold with champagne lenses or silver on silver. A best seller, and the teardrop shape softens every angle.

Coffee Bean Aviator Sunglasses ($30). Caramel lenses and golden arms with UV protection. Warm, easy, everyday.

Cotton Candy Aviator Sunglasses ($29). Pink iridescent mirror lenses for the sweetest version of the softening effect.

Oval face: you're the lucky one

Almost everything works, so pick by personality instead of geometry.

Monet Sunglasses ($39). Five colors. Collect a couple and match them to your mood.

Black Velvet Sunglasses ($35). Black rhinestones in gold studs. A best seller with built-in glamour.

Heart face: balance the frame

A wider forehead and pointed chin want bottom-weighted or winged frames to even things out.

Fab Freddie Sunglasses ($29). Retro mirror lenses inspired by Freddie Brooks of A Different World. Grey, black, or lime green.

Black Vintage Drip Sunglasses ($40). Vintage black frames with orange tinted lenses that draw the eye downward, in the best way.

Long face: go big

Oversized frames shorten and balance a longer face. This is your license to go dramatic.

Dream Sunglasses ($29). Oversized shades that block sun and stares alike.

Brown Vintage Drip Sunglasses ($40). Wide animal print frames with light brown lenses. Retro, bold, balancing.

For every face: the bling section

Some frames aren't about geometry, they're about arrival energy.

Boujie Sunglasses ($29) and Stunning Sunglasses ($39) bring rhinestones for days, and Bronze Brilliance ($40) adds gold-studded opulence. Any face shape, maximum drama.

Find your pair

Every pair is under $50, so getting your summer rotation right won't break the bank. Shop the full eyewear collection, then tag us @shopedgyessentials in your sunny looks. We repost our favorites for the #EdgyGlam.