The exact United Kingdom passport photo size in millimeters, centimeters and inches
If you are preparing a passport application for United Kingdom, the single number that matters most is the printed dimension: 35 × 45 mm. This is the size enforced by His Majesty's Passport Office (HMPO) when you submit a physical photo at a United Kingdom office or visa application centre. Express the same size in centimeters and you get 3.5 × 4.5 cm; express it in inches and you get 1.38 × 1.77 inches. Every United Kingdom photo studio recognises one of these three notations.
Why does United Kingdom insist on exactly 35 × 45 mm and not the closest standard size? Two reasons. First, ICAO Doc 9303 specifies a face-height range that only works when the print falls within tight millimeter tolerances — even being 1 mm off pushes the chin or crown out of the biometric template. Second, His Majesty's Passport Office (HMPO) uses physical templates with a cut-out window of 35 × 45 mm; if your photo is even slightly oversized, a clerk simply cuts it back and the cropped image fails the face-height check.
Print at home or order a print online
If you print at home, use glossy photographic paper rated for inkjet or laser printing. Set your printer to "Best" or "Photo" quality at 300 DPI minimum and to "Actual size" — never "Fit to page", which silently rescales the print. His Majesty's Passport Office (HMPO) regularly rejects home prints on plain paper because they lack the gloss layer that biometric scanners read. If you order from a print service, give them the exact figure: 35 × 45 mm, glossy finish, no border.
Crop digitally first, then print
The reliable workflow is: take the photo with a phone, crop it digitally to the correct pixel size, then send the digital file to print. ImageGates does the digital crop for free — open the United Kingdom passport photo resize tool and your image lands at exactly 413 × 531 pixels (the 300 DPI equivalent of 35 × 45 mm). Then upload the JPEG to your local print shop or print at home on photo paper.
Common millimeter mistakes that get rejected
- Printing at 35 × 45 mm by default when United Kingdom actually needs 35 × 45 mm. Auto print kiosks frequently default to the Schengen 35 × 45 mm size.
- Trimming with scissors after printing. Hand-trimming almost always shaves the head height below the His Majesty's Passport Office (HMPO) minimum.
- Asking for "passport size" without specifying the country. Different countries mean different mm — say "35 by 45 millimetres for United Kingdom" out loud.
His Majesty's Passport Office (HMPO) rule that catches most applicants
Digital photos uploaded through GOV.UK must be between 50 KB and 10 MB and at least 600×750 pixels. This is on top of the size requirement and is the silent rejection cause for many United Kingdom passport applications.