For an extra-wide angle view when you are driving, this pair of blind spot mirrors will do the trick. They can be customized to fit most vehicles, and most owners attach them to the lower, outside corner of the wing mirrors. They are two inches in diameter and a round shape. The mirrors are made from HD glass and are a convex design.
They are both waterproof and rust-resistant and will stand up to various weather conditions. There is no frame to get in the way of your view. It attaches to your car using a strong adhesive tape in one of two ways. You can fix it directly to the wing mirror. Alternatively, you can fix it using the small angle bracket. This allows you to tilt it at 30 degrees in any direction so you get 360 degree adjustment to suit drivers of different heights and to fit different makes and models of car.