Crop a photo to 40 × 50 mm — Hong Kong ID card
Upload a photo — the frame is already set for a Hong Kong ID card. Ready to print or upload.
Document
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Want studio precision?AI correction fixes the light, shadows, clothing and pose — to the document's rules.€2.99
Exact numbers for this document
| Parameter | What it must be |
|---|---|
| Print size | 40 × 50 mm |
| Pixels at 300 dpi | 472 × 591 px |
| Pixels at 600 dpi | 945 × 1181 px |
| Aspect ratio | 4:5 |
| Head, share of height | 70–80% of photo height |
| Background | Plain light background without textures or noticeable gradients. |
| Glasses | Clear glasses only, no reflections; sunglasses prohibited. |
| Head covering | Religious reasons only; must not cover the facial oval. |
What these millimetres work out to
- In a 40 × 50 mm frame a head band of 70–80% is 35–40 mm from the chin to the crown.
- Of the 50 mm of height that leaves 10–15 mm for the gap above the crown and the space below the chin together.
- At 300 dpi that is a head 413–472 pixels tall — below 413 px the file is too small to print, however good the crop is.
- Against the European 35 × 45 mm standard this frame is 1.14 times as wide, 1.11 times as tall and 1.27 times the area — a photo cut for one of the two cannot be reused for the other.
What this document is
Hong Kong identity cards are issued by the Immigration Department at Registration of Persons (ROP) offices, by appointment booked online, in the ImmD app or by phone. At the office the applicant takes a tag number; then, at a registration booth, both thumbprints are scanned, the photo is taken and the form is checked and signed. Holders of a valid locally issued smart identity card aged 18 or over can also use the Personal Documentation Submission Kiosks at Immigration Headquarters in Tseung Kwan O without an appointment.
How to crop it, in three steps
- 01
Upload a photo taken face-on, in even light
- 02
The tool finds the face and aligns the frame itself — check that the head lands in 70–80%
- 03
Save the 40 × 50 mm result — print it or attach it to the application
What we fix for free, and what AI fixes
Fixed for free
- Background. Replaced with the one this document asks for: plain light background without textures or noticeable gradients.
- Head tilt. Straightened if the head leans slightly to one side.
- Frame. Exactly 40 × 50 mm, by the document’s rules.
- A light shadow on one side of the face. Gently brightened.
- File and print sheet. A file to the document’s rules and a 10 × 15 or A4 sheet to print.
What can't be fixed for free, AI correction fixes
- Hard shadows and uneven light on the face.
- A smile, raised brows or a half-open mouth. Cropping keeps the face it was given.
- Too few pixels. If the original is smaller than 472 × 591 px, enlarging it only blurs the face.
- Clothing and pose. Shoulders out of frame, body turned away from the camera.
Glare on the lenses. Take the glasses off or turn away from the light source and shoot again.
Why these photos get rejected — and how to fix each one
Hong Kong-specific things to know
- Hong Kong takes the identity-card photograph itself at the registration booth, so the applicant's own print is needed only for a child under 11 or an application from overseas — each in a different size from the print of this page (50 × 40 mm and 29 × 35 mm).
- The FAQ spells out ten failures — from hair across the eyebrows to «eyes tilted» and overdone make-up — and asks for a centred, full frontal face.
Printing on a single sheet
3 × 2 frames fit on one 10×15 cm sheet — 6 copies from a single print.
Print at 100% scale, borderless, and turn off fit-to-page so each photo keeps its exact size.
10 × 15 cm · 4 × 6″Photos: 6 (3 × 2)
A4 · 21 × 29.7 cmPhotos: 28 (4 × 7)
Where these numbers come from
Source: Immigration Department of the Hong Kong SAR — Registration of Persons Offices. Last checked against the official page on 1 Oct 2026.
What the source confirms
- Hong Kong Immigration Department, «Registration/Replacement of Hong Kong Identity Card»: all Hong Kong residents aged 11 or over are required to register for an identity card, with exceptions; applicants book an appointment on the Internet, with the Immigration Department mobile app or by phone, and go to a Registration of Persons Office, where they obtain a tag number, fill in the form with the self-service facilities or on a mobile device, and go to the registration booth to scan left and right thumbprints, take the photograph and verify and sign the form, then attend an interview with the assessment officer.
- Same page, the photograph and the time: «Upon taking photograph, the applicants have to conform to the specifications as set out in the photograph requirements page»; the processing time is usually 5 working days and the new card can usually be collected on the next working day after the processing; there is no fee for the registration of an identity card, but a replacement due to loss, destruction, damage, defacement or alteration of personal particulars is charged; the appointment booking period is 96 working days.
- Same page, the cases with a photograph supplied by the applicant: a child under 11 applying to replace a lost, destroyed, damaged or defaced card produces one recent photograph (50 × 40 mm, full face) if not taller than 90 cm; for a permanent identity card applied for from overseas the applicant supplies two recent identical photographs — size 29 mm (width) × 35 mm (height), showing the full face with no hat, a plain background of a light colour, on photographic paper that is thin, unglazed, unmounted and of a type that can be firmly affixed to paper.
- Hong Kong Immigration Department, FAQ on Hong Kong identity cards, Q7: the photograph on the smart identity card should show the full frontal face with clear facial features; not accepted (including but not limited to): hair across eyes or eyebrows; head coverings such as hats and headbands; ornaments such as earrings that obscure the ear or face; reflection on a frame or tinted lens; a frame across the eyes or eyebrows; coloured contact lenses; overdone make-up; not centred; exaggerated facial expressions; eyes tilted; the Department also links a video with photo-taking tips.
Questions people ask before cropping
What size must an ID card photo be in Hong Kong?
40 × 50 mm. 70–80% of photo height.
How many pixels is 40 × 50 mm when printed?
472 × 591 px (300 dpi) · 945 × 1181 px (600 dpi).
How much of the frame should the head take?
70–80% of photo height.
What background does this document need?
Plain light background without textures or noticeable gradients.
What can’t be fixed here for free?
Hard shadows and uneven light on the face. A smile, raised brows or a half-open mouth. Cropping keeps the face it was given. Clothing and pose. Shoulders out of frame, body turned away from the camera. AI fixes this from the same photo — you see the result before paying.
How many photos fit on one 10×15 cm sheet?
3 × 2 frames fit on one 10×15 cm sheet — 6 copies from a single print.