what is passport size

Passport size refers to the size of a photograph that is required for a passport or visa application. The correct size of a passport photo is 2 x 2 inches (51 x 51 mm) . The photograph should be taken within the past six months, showing the current appearance of the applicant. The head of the applicant should be centered in the frame, facing the camera directly, with both ears visible. The photograph should have a white background, and the applicant should not be looking down or to either side. The head of the applicant should be between 1 to 1 3/8 inches (2.5 to 3.5 cm) when measured vertically. The photograph should be printed on thin, photo-quality paper.