What size is a green card photo?
USCIS wants a 2 x 2 inch color print that shows the full face from the front. Measured from the top of the hair to the bottom of the chin, the head should be 1 to 1 3/8 inches tall.
The eyes have their own window: the top of the eyes sits 1 1/8 to 1 3/8 inches up from the bottom edge. Because USCIS measures from the top of the hair, a tall hairstyle counts toward the head height.
Source: uscis.gov
