Passport Photo Size: Inches, Pixels, Head Size & Print Layout

The required U.S. passport photo size

A U.S. passport photo for a paper application must measure exactly 2 x 2 inches. In metric units, that is 51 x 51 mm. The photo is square, not portrait-shaped, and it needs enough visible shoulder and head space to look natural inside the frame.

The square size is only the first measurement. The face must also sit in the correct part of the square. If the head is too large, the top of the hair may be cramped. If the head is too small, the image may be rejected even though the outer square is correct.

• Outer size: 2 x 2 inches, or 51 x 51 mm.
• Head height: 1 to 1 3/8 inches from bottom of chin to top of head.
• Paper: Matte or glossy photo-quality paper for printed submissions.

Passport photo size in pixels

Pixels and inches are connected by print resolution. A 2 x 2 inch photo at 300 DPI needs 600 x 600 pixels. That is a practical minimum target for a sharp U.S. passport print, because 300 DPI is the common standard for photo-quality printing.

A larger file can still be used, but the final printed output must not scale unpredictably. A 1200 x 1200 pixel passport crop can print sharply at 2 x 2 inches if the print software outputs it at the correct physical size. The danger is not too many pixels; the danger is accidental scaling in the print dialog.

• 300 DPI target: 2 inches x 300 DPI = 600 pixels, so 600 x 600 px is a practical print target.
• Higher resolution: Acceptable if it is printed at exactly 2 x 2 inches.
• Low resolution: Risky if the final print looks blurry, grainy, or pixelated.

How to think about head size

The head measurement runs from the bottom of the chin to the top of the head, including hair. For U.S. passport photos, that height should be between 1 inch and 1 3/8 inches. In a 2 inch square, that means the head occupies about half to a little more than two thirds of the photo height.

When cropping manually, do not only center the eyes. Look at the full head, chin, shoulders, and top margin. The subject should face forward, the face should be centered horizontally, and the crop should not feel cramped.

Printing on 4 x 6 photo paper

Most home photo printers and many pharmacy photo labs use 4 x 6 inch paper. A passport photo tool can place multiple 2 x 2 inch squares on one 4 x 6 sheet so you do not waste paper. At 300 DPI, a 4 x 6 inch sheet is 1200 x 1800 pixels if printed in portrait orientation or 1800 x 1200 pixels in landscape orientation.

The important print setting is usually 100 percent scale, actual size, or no scaling. Avoid fit to page if it changes the physical dimensions. After printing, measure the 2 x 2 square with a ruler before cutting and submitting.

1. Create a 2 x 2 inch passport crop.
2. Place copies on a 4 x 6 inch sheet at 300 DPI.
3. Print on photo-quality paper with scaling disabled.
4. Measure one printed photo before cutting the rest.

Common size mistakes

The most common mistake is assuming that a square image file is automatically a passport photo. A square crop can still have the wrong head size, poor resolution, or an incorrect physical print size.

Another common mistake is using a photo lab or print dialog that enlarges the sheet to fill margins. That can make a carefully prepared 2 x 2 photo print slightly too large. If exact size matters, print a test sheet and measure it.

• Cropping to 1:1 without checking head height.
• Printing from a preview app that silently scales to fit paper.
• Using plain office paper instead of photo-quality paper.
• Downloading a tiny image and stretching it to 2 x 2 inches.
• Cutting inside the border and making the final photo smaller than required.

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