Passport Photo Size by Country, in cm and Pixels

Passport photo size at a glance

One row per document; the sources table at the end gives the date we read each one. “Not stated” means that document says nothing on the point. None of the documents gives a DPI.

4.5 × 3.5 cm and 45 × 35 mm are the same print: 1.77 × 1.38 in. The two Indian files that give a print size disagree (45 × 35 mm in one, 51 × 51 mm in the other), so read the next section before you print.

What the Indian passport asks for

Three Indian documents state a passport photo size, and they do not agree. Which one is yours depends on how you apply. A paper application handed in at a District Passport Cell, Speed Post Centre or Citizen Service Centre follows the instruction booklet. An online upload follows the ICAO guideline, which is the file the Indian embassy in the US links when it lists “An ICAO-compliant photograph” among the uploads it makes mandatory (migration to GPSP 2.0 notice (opens in a new tab), read 14 Oct 2026).

The overseas file was read from an archive because its host did not answer from our network on 14 Oct 2026. It is dated 2021 inside the PDF and older than the ICAO guideline, so we cannot say if it still applies. If you apply through an Indian mission, ask the mission.

The ICAO guideline also asks for photos “unaltered by computer software”. The tool on this page changes the pixel size and the file size and nothing else: it does not retouch, smooth or change the background. If a studio gives you a file that is already 630 × 810 px, upload that file as it is.

The KB limit for the Indian upload

Pages that repeat 630 × 810 px often attach a file limit, and 250 KB is a common one. We did not find that figure in any Ministry or Passport Seva document we could open. The ICAO guideline sets no file size. The only KB range printed in an Indian passport document that we read is the 20 to 100 KB in the overseas file above. Use the limit your upload screen shows. If you only need to stay inside the overseas range, the test further down takes a 630 × 810 px file to 98,201 bytes.

UK, US, Canada and India e-Visa photo rules

United Kingdom

A printed photo must “measure 45 millimetres (mm) high by 35mm wide” and the head, “from the crown of your head to your chin”, must be “between 29mm and 34mm high”. The online upload must be “at least 600 pixels wide and 750 pixels tall” and “at least 50KB and no more than 10MB”. GOV.UK asks for a plain cream or light grey background on prints and a plain light-coloured one on digital photos (printed (opens in a new tab), digital (opens in a new tab), read 19 Oct 2026).

This page has no UK preset, because GOV.UK asks for an untouched photo. A digital photo must be “unaltered by computer software”, and for a photo taken on your own device it says “Do not crop your photo - it will be done for you.” If your own photo is at least 600 × 750 px and between 50 KB and 10 MB, upload it as it is, or get a photo code from a booth or shop.

United States

The paper print is “2 x 2 inches (51 x 51 mm)” with the head “between 1 -1 3/8 inches (25 - 35 mm)” from the bottom of the chin to the top of the head. An online renewal takes a JPG, JPEG, PNG, HEIC or HEIF file, and “The file size should be between 54 KB and 10 MB.” Neither page gives a pixel size (paper photos (opens in a new tab), online renewal upload (opens in a new tab), read 19 Oct 2026).

This page has no US preset. The State Department says “Submit the original, unchanged photo.” and “Do not change your photo using computer software, phone apps or filters.” For an online renewal it says “You can reposition or crop your photo in the application.” (both pages re-read 8 November 2026). If your own photo is between 54 KB and 10 MB, upload it as it is, or get prints from a photo service.

Canada

Printed photos “must be 50 mm wide by 70 mm high (2 inches wide by 2¾ inches high)” with the face “between 31 mm (1¼ inches) and 36 mm (1⁷⁄₁₆ inches) from chin to crown”. The digital photo for an online renewal must be JPEG, “at least 1,800 pixels high by 1,200 pixels wide”, “no larger than 4,500 pixels high by 3,000 pixels wide” and “between 200 KB and 5 MB in size” (Canada.ca passport photo requirements (opens in a new tab), read 19 Oct 2026).

This page has no Canadian preset either. Canada wants the photo “taken in person by a commercial photographer or photo studio”, says “The file must be saved directly from the original file captured by the camera” and counts any edit, cropping included, as an altered photo that gets the application refused. Resizing a file here would break that rule, so ask the studio for the digital copy and the prints.

India e-Visa

The portal wants a JPEG with “Minimum 10 KB” and “Maximum 1 MB”, and says “The height and width of the Photo must be equal.” It gives no pixel count, so a square picture inside the file limit meets what the page says (e-Visa instructions (opens in a new tab), read 19 Oct 2026). The e-Visa preset in the tool makes a 600 × 600 px square; that number is our choice, not the portal's.

Passport photo size in pixels, worked out

Three pixel sizes on this page come from a document: 630 × 810 px (Indian ICAO guideline), the 600 × 750 px minimum (GOV.UK) and Canada's 1,200 × 1,800 to 3,000 × 4,500 px range. Every other pixel size is a print size turned into pixels, which needs a DPI that no document gives. The table converts the two print sizes at three common DPIs. The rule behind it is in the pixels, KB and DPI guide.

Worked for 35 × 45 mm at 300 DPI: 35 ÷ 25.4 × 300 = 413.4, so 413 px; 45 ÷ 25.4 × 300 = 531.5, so 531 px. No page in the sources table states 413 × 531 px.

The Indian upload size has the same 7 : 9 shape as a 35 × 45 mm print, since 630 ÷ 35 and 810 ÷ 45 both give 18 pixels per millimetre. Read as a print of 35 × 45 mm, that is about 457 DPI. The guideline itself does not say so; it gives pixels only. For a size that is not here, use resize image in pixels.

Stamp size photo: no authority defines it

We searched for an official definition of “stamp size” on 14 Oct 2026 and found none in any notice, bulletin or ministry page. Every page that gives a stamp size in centimetres is a photo service or an explainer, and they do not give one size. So this page lists no stamp size. When a form uses the phrase, the measurement is whatever that form prints, and a form that prints none leaves you to ask the office or to fit the photo to the box on the paper.

• A college admission form for 2010-2011 has a box captioned “Stamp Size Photograph” and no measurement (Application form for Session 2010-2011 (opens in a new tab), the box at the top right of page 1, read 14 Oct 2026).
• The IBPS notice heads its photograph rules “Photograph Image: (4.5cm × 3.5cm)” and then asks for “Dimensions 200 x 230 pixels (preferred)” and a file “between 20kb–50 kb”. A 3.5 × 4.5 cm print is 7 : 9 and 200 × 230 px is 20 : 23, so the two are not the same shape; the pixels are what the upload checks (IBPS RRB XV Officers notice, Annexure III (opens in a new tab), first page of the extract, heading of the photograph rules, read 14 Oct 2026).
• The NEET (UG) 2026 bulletin asks for a “passport size photograph” with no dimension at all, and then tells candidates to keep “6 to 8 passport size and 4 to 6 Post Card size” prints, giving a number only to the postcard size, 4 × 6 inches (NEET (UG) 2026 Information Bulletin (opens in a new tab), item d(i) on printed page 16 and the note on printed page 17, read 14 Oct 2026).

How we tested

On 14 Oct 2026 we ran this tool's own size search on a computer-generated portrait picture of a scene with no person in it: 3024 × 4032 px and 3,113,800 bytes. Each row is one run with fill frame, the setting the passport presets use. The 50, 100 and 200 KB ceilings are ours, chosen to show how the quality moves; no official document gives a ceiling for the Indian upload.

Every output sat inside its window whether a KB is counted as 1,000 or 1,024 bytes, and none needed padding. The run used a Node image library in place of the browser canvas, so Chrome or Safari will give other byte counts for the same picture. The picture has no face, so this shows the pixels and the KB, not how a portrait crops.

We also ran this page in desktop Chrome on 14 Oct 2026, with a 3024 × 4032 px JPG of 2,540,195 bytes, and opened the downloads to read their pixels. Centimetres at the opening 3.5 × 4.5 cm, 300 DPI, 100 KB: 413 × 531 px, 98,011 bytes. Indian passport photo preset, 100 KB: 630 × 810 px, 96,800 bytes.

Sources and read-on dates

Every size and quote on this page comes from a row below, with the date we opened it.