If you need a passport or visa photo for the US, then you can use the US passport photo checker from the DVLottery.me website. It tells if your photo meets official requirements.

Sometimes visa photo requirements match with passport photo requirements in a selected country. Sometimes they differ. Please select your country of destination and then find the visa photo on Visafoto.com to get your visa photo. On the next page you will find the exact dimensions. You can also select your visa type for your destination country fro...

As mentioned above, the standard size of passport photos in America is 2x2 inches (51x51 mm). If you are applying for a US visa or passport online at the state.gov website, it is also necessary to take into account a size of passport photo in Kilobytes. It should not exceed 240 KB. Pixel size of passport photo should be 600x600 pixels (i.e. 2x2 inc...