Passport photo size is regulated in order to fit the size and shape of the passport and to accurately display the likeness of the person. There are also specific regulations regarding, for instance, distance from the top of the hair to the bottom of the chin in the photo.
Western countries usually prohibit anything that obscures facial features and hair, and require the subject to look directly at the camera.
Many countries require two identical photos to be submitted.
Age of Photo
The photo should be recent---for instance, less than 6 months old for the United States, and less than a month old for the United Kingdom.
Official government websites and publications are the proper sources of detailed information on a country's passport photo regulations, since passports are government-issued documents.
Article Written By Jennifer A. Richter
Jennifer Richter has worked in a variety of fields, including foreign diplomatic service, education and journalism. She is eager to share her varied cultural and professional experiences through her writing and has been published in Futures Mystery Magazine and eHow. She holds a B.A. in economics and political science from Hofstra University.