51mm Sunglasses for Men & Women

Size matters when shopping for sunglasses. This collection features AO’s 51mm sunglasses. Explore styles in your size.

Shop our 51mm sunglasses

You don’t need big lenses to have big style. Our collection of 51mm sunglasses offers a range of shapes- round, square, and browline- to complement your personal style. Shop AO’s 51mm sunglasses now.

Superior clarity and eye protection with AO polarized lenses

For the clearest optics, opt to add polarization to your AO lenses. Polarized lenses eliminate glare by blocking reflected light. The improved clarity reduces eye fatigue. Choose the best 51mm polarized sunglasses for your lifestyle – you can add polarization to either SkyMaster glass or AOLite nylon lenses. All AO sun lenses feature 100% UV protection.