2×2 Inch (51×51mm) Passport Photo
A 2×2 inch photo is exactly 51×51mm — a square format. It is the size used for US passport photos, published by the US Department of State.
51×51mm in pixels, at print resolution
Millimeters aren't directly useful for a digital file — printing needs a pixel count at a given resolution (DPI). Here's 51×51mm converted at the two resolutions most photo labs and home printers use:
| Resolution | Pixel size |
|---|---|
| 300 DPI | 602 × 602 px |
| 600 DPI | 1205 × 1205 px |
Vekyo's printable PDF renders at 600 DPI so a print shop can't reject it for low resolution — you don't need to pick a pixel size yourself.
Good to know about 51×51mm
- 2×2 inches isn't a size most pharmacy or drugstore photo kiosks offer directly (their standard passport-photo print is usually 4×6in with multiple smaller photos on it) — Vekyo's printable sheet lays out several 2×2in copies on one 4×6in or A4 print instead of relying on a kiosk to crop it for you.
- The US passport photo requirement is a fixed inch/mm size, not a percentage of image height like a US visa photo — a photo correctly sized for a US passport is not automatically the right size for a US visa (DS-160), which instead needs a 600×600 to 1200×1200px square digital file.
Which document uses this size
This list is generated directly from Vekyo's requirement catalog — see each document's page for full details, official source, and last-verified date.