They require an 8mm hole to fit. The mirror arm is ~100mm and the base ~60mm x 22mm. It is possible to mount them on the wings or the doors. And gaskets for the base are included.
The Classic Car Wing Door Mirrors 313 Omnico, Stainless Steel & Chrome Round, Convex is an ideal fit for classic vehicles, offering a stylish and functional look to enhance the overall appearance of the car.