Each country has its own requirements for passport photos. While in Russia, for instance, it’s not allowed to smile in the photo, the US requirements are less strict. Photo size, proportions, color of the background – they are all different as well as the visa requirements for different countries. Most consulate offices and passport agencies have their own facilities for professional photo taking – and that’s definitely the easiest way of accommodating the requirements of different institutions. Still, someone may prefer to save money and have a passport photo taken at home; some photo studios have to process so many photos that they will appreciate ready-to-use profiles for a quick and professional customer service. If we take the US passport photo as an example, It must be exactly 2 inches tall and 2 inches wide. First and foremost, your photo needs to be resized. The acceptable length from your chin to the top of your head must be between 1 and 1 3/8 inches, according to the State Department. ImageConverter Plus lets you specify the resize parameters in inches (as well as percent value and centimeters). The passport size requirement varies between different countries. Preparing your photo for printing adjust the dpi.