what is the size of 2x2 picture

A 2x2 picture has a length (or height) of 2 inches and a width of 2 inches (51x51 mm) . The 2x2 ID picture size in cm is 51x51 mm. If you need a digital photo for online submissions, remember that the 2x2 ID picture size in pixels is 600x600 px. The preferable file format is jpeg.