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US passport photo size: the 2×2 inch guide
51×51 mm square format, white background and head-height rules — for passport and DS-160.
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USA2x2Passport
Size and background
US passport photos are a 2×2 inch (51×51 mm) square. Background must be plain white.
Head height from chin to crown should fall roughly between 1 and 1⅜ inches.
Practical tip
Select “US Passport” in the document picker so AI applies the crop. A digital file is enough for most online applications.