I don't know if it's the same for US passport photos, but US visa photos need to be a larger square whereas most European photo requirements have a smaller port

I don't know if it's the same for US passport photos, but US visa photos need to be a larger square whereas most European photo requirements have a smaller portrait aspect ratio. The photo is no different, it's just that there's prescribed size in imperial units for US visa photos. At one point I went to a photo shop to get US visa photos since I knew a photo booth wouldn't do the right thing, but they printed out Euro style photos by mistake, and I had to ask them to do US ones instead, so I got both sets of photos. Exactly the same zoom, exactly the same photo, just the Euro style was cropped more. Edit: I looked them up: https://www.gov.uk/photos-for-passports/photo-requirements https://www.gov.uk/photos-for-passports/photo-requirements - 35mm wide by 45mm tall. https://travel.state.gov/content/travel/en/passports/how-apply/photos.html https://travel.state.gov/content/travel/en/passports/how-app... - 2 inches square.