2 × 2 vs 35 × 45 vs 50 × 70 Passport Photos: Choose the Application Route First

The useful question is not “Which passport size is standard?” It is “Which document and application route am I using?”

A 2 × 2 inch print, a 35 × 45mm print and a 50 × 70mm print are different paper outputs for different passport routes. A digital upload can have another set of rules. The size of a crop is a measurable output; it does not decide whether the underlying photo meets content requirements or what an authority will decide.

Example 1: US passport paper application

The US Department of State specifies a square 2 × 2 inch (51 × 51mm) colour photo for a paper passport application. The head must measure 1 to 1⅜ inches (25–35mm) from the bottom of the chin to the top of the head.

For this route, the official requirement is the physical print size and composition, not a universal upload pixel or DPI value. A checker can help set the print frame from an original photo, but it cannot make an edited source photo suitable for the application.

The State Department also says to submit the original, unchanged photo: do not change it with computer software, phone apps, filters or artificial intelligence. Do not use a crop or print layout as permission to retouch a face, replace a background or otherwise change the image content.

Read the US Department of State passport photo requirements.

Use the US passport route guide when you need the product workflow for this paper route.

Example 2: UK passport paper application

For a UK passport application made with a paper form, GOV.UK requires two identical printed photos measuring 35mm wide × 45mm high. The image from the crown of the head to the chin must be 29–34mm high.

The photos must be printed on suitable photographic paper and be unaltered by computer software. This is a portrait frame, so do not stretch or trim a finished US square crop into it. Return to the original photo and make a new composition for the UK paper route.

Read the GOV.UK printed passport photo requirements.

The UK passport route guide keeps the paper and digital choices separate before the file reaches the checker.

Example 3: Canadian passport paper application

For new adult passports and renewals in person or by mail, the Government of Canada requires two identical, unaltered photos measuring 50mm wide × 70mm high. The face, from chin to crown, must measure 31–36mm.

These photos must be taken by a commercial photographer or photo studio and professionally printed on plain, high-quality photographic paper. Canada’s guidance says that the original photo must not be altered with editing software, filters or AI tools; it also lists cropping around the head and shoulders, background changes and appearance edits as alterations. The 50 × 70mm figures here are for this paper route. Canada lists separate specifications for online renewal, so do not reuse the paper dimensions for that digital route.

Read the Government of Canada passport photo requirements.

UK digital applications are a separate route

The UK online passport application does not ask for a 35 × 45mm printed output. Its separate digital guidance requires a JPEG, at least 600 pixels wide × 750 pixels tall, between 50KB and 10MB, and unaltered by computer software. When someone takes the photo on their own device during the application, GOV.UK says not to crop it because the online application handles the crop.

These are digital file facts, not a paper-photo size. Do not turn them into a 35 × 45mm print rule or a universal pixel answer for other countries.

Read the GOV.UK digital passport photo requirements.

Keep crop measurements separate from content review

The crop and output checks can measure the frame, physical print dimensions, file type, bytes and pixels requested by a route. Those measurements do not decide whether the photo itself is suitable for an official application.

Content review remains a separate manual boundary: check the background and shadows, face position, expression, eyes, clothing, likeness and whether the source image has been altered. For the US and Canada, the official guidance explicitly rules out software, filter and AI changes. A dimension result is not an approval decision, and this page cannot promise an application outcome.

Why converting a finished crop causes trouble

A square frame, a 7:9 portrait frame and a 5:7 portrait frame allocate different space above the head and beside the shoulders. Stretching changes appearance. Trimming can remove necessary margin. Enlarging a small finished file can preserve the nominal size while reducing real detail.

Use this sequence instead:

1. Identify the exact document and whether it is a digital or paper application.
2. Start from the original, uncropped photo.
3. Apply the required crop or print layout only for that route.
4. Check format, bytes, pixels and physical dimensions as measured facts.
5. Manually review the background, shadows, face, expression and recent likeness.

Limits of an online checker

The browser can measure dimensions and create a physical print layout. It cannot determine whether an official will accept the applicant’s background, expression, pose, likeness or photo history. If the source photo is blurred, tilted, shadowed or edited, take a new photo.

Open the verified passport photo checker.