Passport photos are an essential requirement for traveling and identification purposes across the world. These pictures represent our likeness and identity on official documents, including visas, passports, and permits. Synonyms for passport photos include identification photos, visa photos, visa application photos, headshots, portrait photographs, visa size photographs, and bio-data photos. These terms all refer to the same type of images used for personal identification and are usually standard in size and pose. Whether taken by a professional photographer or in a photo booth, passport photos are typically required to meet specific guidelines in terms of dimensions, background, and pose to be considered valid for official use.