Passport Photo Requirements: Size, Background, and the Rules That Cause Rejections

Most passport photos are rejected for one of a handful of reasons, and none of them are about how you look. They are about geometry and lighting: the head is the wrong size in the frame, the background is not plain, there is a shadow behind the ear, or the eyes are half closed. This guide lists every rule that a reviewer actually checks, explains what each one means in plain terms, and tells you how to meet it without a studio. The specifics here follow the ICAO standard that most countries base their rules on, with the two big exceptions (the United States and a few others) called out where they differ.

The Rules Almost Every Rejection Comes Down To

A passport photo has to be machine-readable as much as human-readable, because border systems compare it against a live camera. That is why the rules are so strict about head size and even lighting: the face has to be measurable, not flattering. Here is the full checklist a reviewer works through.

Size and Head Height

The outer photo size and the head height inside it are two separate rules, and the head height is the one people miss. A US photo is 2 by 2 inches with the head between 1 and 1 3/8 inches from chin to crown. Most other countries use 35 by 45 mm with the head between 32 and 36 mm. If you stand back to fit your shoulders in and never crop, the head ends up far too small, which is the single most common measurement failure. Frame loosely when you shoot so you have room to crop, then crop to put the head at the right height.

Background

Plain and light is the whole rule, and it is stricter than it sounds. White or very light grey, with no pattern, no gradient, and nothing behind you. The trap is not the wall color, it is the shadow you cast on it. Standing right against a white wall throws a hard shadow around your head that reads as a dark edge, and that alone fails the photo. Stand about half a meter in front of the wall so any shadow falls low and out of frame, and use soft light rather than a single hard lamp.

Expression, Eyes, and Glasses

Neutral expression means mouth closed and no smile, because a smile changes the shape of the face the border camera has to match. Both eyes open and looking straight at the lens. Glasses are the fastest-changing rule: the US, the UK, and a growing list of countries now require you to take them off entirely, and where they are still allowed there must be no glare and no frame covering any part of the eye. If your prescription lets you manage without them for one photo, take them off and remove the question.

Lighting and Shadows

Half of all rejections are really lighting problems wearing another label. A single overhead light or a phone flash puts a shadow under the nose and to one side of the face, and a wall-hugging pose puts one behind the head. The fix is soft, even light from the front. Daylight from a window off to one side, with you facing the window, is the easiest source that works. Avoid direct flash, avoid a light directly overhead, and give the wall enough distance that nothing lands on it.

Digital or Printed

Online applications want a digital file, usually JPEG, above a minimum pixel size (600 by 600 for the US, often 900 by 1200 for a 35 by 45 mm photo) and under a maximum file size. In-person and mail applications want prints on photo paper at the exact physical dimensions. The same well-composed shot serves both: you crop it to the right proportions once, then export a digital copy and print a copy. What you cannot do is stretch a too-small photo up to the pixel minimum, because the reviewer sees the softness.