Square frames are known for their good coverage style. If they are oversized, then you can expect to have the super protection from the harsh glare of the sunlight.
The dark green shade of the sunglass looks serious and hence you can wear it to your office. The big size is definitely a savior from the dark circles.
If you are a fan of square-shaped sunglasses, then check a pair of green sunglasses like the following one. Not only does it look good, but makes you look good too.
The tinted glasses go well with a dark green border. The square frames definitely add to the smartness of the sunglass.