NOPPAWAsk three institutions for an ID photo and you will collect three different rectangles: 3×4 centimetres for one, 35×45 millimetres for another, 2×2 inches for a third. None of them is wrong — they are just local standards that grew up independently. This guide puts the sizes you are most likely to meet on one table, converts each into the pixels a printer actually needs, and flags the conventions that get photos rejected even when the size is right.
Why there are so many photo sizes
ID photos predate digital cameras by a century, and each country's bureaucracy standardized around its own print stock and card formats. International aviation rules harmonized the composition — head height, eye line, plain background — far more than the paper size. The result: the portrait rules feel familiar everywhere, while the rectangle changes at every border. Treat any size printed in a requirement as exact. A photo that is "close to 35×45 mm" is, to the clerk or the automated checker, simply the wrong size.
The sizes side by side
These are the dimensions the Passport Photo Maker uses, with pixel counts at the 300 DPI resolution print shops expect:
| Used for | Print size | Pixels at 300 DPI | Common background |
|---|---|---|---|
| Indonesia ID and general documents | 3 × 4 cm | 354 × 472 px | Red or blue by document type; white also common |
| Indonesia passports and formal files | 4 × 6 cm | 472 × 709 px | White or institution-specified |
| US passport and visa | 2 × 2 inch (51 × 51 mm) | 600 × 600 px | White or off-white |
| UK and EU passports | 35 × 45 mm | 413 × 531 px | Plain light grey or cream |
| India passport and visa | 2 × 2 inch (51 × 51 mm) | 600 × 600 px | White |
| China visa | 33 × 48 mm | 390 × 567 px | White |
Notice that 3×4 and 4×6 are ratios as much as sizes: the same crop serves both, printed at different scales. And two countries can share a rectangle — the US and India both use 2×2 inch — while differing in background, head-size and recency rules, so the table is a starting point, not the whole requirement.
What 300 DPI actually means
DPI is the bridge between the physical size and the pixel count: pixels = inches × 300. A 3 cm edge is 1.18 inches, so it needs 354 pixels to print at full quality; a file of 120 × 160 pixels stretched onto the same 3×4 print spreads each pixel three times wider and comes out visibly soft. This is why upscaling cannot rescue a tiny photo — software can invent pixels, but it cannot invent the detail between them. If your source photo is smaller than the pixel target in the table, retake it closer to the camera rather than enlarging the file.
Background colours and other conventions
Background rules are the least portable part of any photo standard. White is the most common demand worldwide. Indonesia adds a local convention many applicants meet: certain documents have historically asked for red or blue backgrounds, sometimes varying by document type or birth year. UK guidance asks for a plain light background such as light grey or cream, deliberately not bright white. One honesty note matters more than any of these specifics: institutions revise these rules, sometimes quietly. Before you print a stack, check the current requirement on the official page of the institution you are submitting to — this guide records the conventions as they stand, but the checklist in front of the clerk is the one that counts. And a tool note in the same spirit: a photo maker can crop, size and print your photo, but it cannot repaint the wall behind you — shoot against the right background in the first place.
Printing at home or on a 4R sheet
Nobody prints one 3×4 photo on a whole sheet. Photo studios tile copies onto a 4R sheet (about 10.2 × 15.2 cm), and the maker does the same: pick the 4R option and it arranges as many copies of your sized photo as fit, ready for a standard photo print at home or at a kiosk. Print at 100% scale — never "fit to page", which would quietly shrink every photo off-spec — and cut along the tile edges. Leave one uncut sheet as your spare set; ID photos are requested at the worst moments.
Mistakes that get photos rejected
- Cropping by eye. A freehand crop almost never lands on the exact ratio; the photo then fails the measurement it was made for.
- Printing a screenshot. Screenshots of a photo are low-resolution and often carry the wrong aspect ratio.
- Upscaling a tiny file. The pixel count rises, the detail does not.
- Wrong background for the institution. A perfect portrait on blue fails a form that demands white.
- Old photos. Most passport rules require a recent photo, typically within six months — check yours.
Size the photo exactly, mind the background, print at full scale, and the boring part of the application stays boring. If the same institution also caps the digital file — many now take uploads — the guide to compressing an image to 100KB covers the byte side of the same photo.