4×4 cm Photo (40×40 mm)
4×4 cm (40×40 mm) is a square photo size used on some application forms, membership and student cards, and a few visas. It's smaller than a 2×2 inch (51×51 mm) US photo, so check which one your form means before you print.
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Wrong background color
Using white when cream is required, or off-white when pure white is needed. Our AI detects and flags background issues instantly.
Shadows on face
Overhead or side lighting creates shadows that cause rejection. SnapID checks for even lighting on both sides of your face.
Incorrect head position
Head tilted, turned to the side, or not centered in the frame. Our AI measures exact positioning against official rules.
Eyes not visible
Closed eyes, hair covering eyes, or glare from glasses. Especially common with babies — our AI checks for this.
Wrong dimensions
Each country has exact size requirements. SnapID auto-crops to the precise dimensions needed for your destination country.
Blurry or low-resolution photo
Out-of-focus or heavily compressed photos get rejected. SnapID checks sharpness and resolution before you pay.
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Tips for a perfect photo
Exact size
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40 mm × 40 mm — 472 × 472 pixels at 300 DPI, or about 1.57 × 1.57 inches.
How the head is framed
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Your head (chin to top of hair) takes up about 60% of the height — roughly 24 mm — with a little space above. If your form gives its own head-size rule, follow that.
Printing
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A 4×6 inch print fits 6 photos; an A4 sheet fits 24. Print at actual size (100%) and cut along the grey lines.
Check the form first
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Some documents that use square photos — like certain visas — want a specific background colour or only accept studio photos. If the form names a document, check its official rules before you order.
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Upload Photo – Free Check4×4 cm Photo (40×40 mm) – Complete Guide
Exact size: 40 mm × 40 mm — 472 × 472 pixels at 300 DPI, or about 1.57 × 1.57 inches. How the head is framed: Your head (chin to top of hair) takes up about 60% of the height — roughly 24 mm — with a little space above. If your form gives its own head-size rule, follow that. Printing: A 4×6 inch print fits 6 photos; an A4 sheet fits 24. Print at actual size (100%) and cut along the grey lines. Check the form first: Some documents that use square photos — like certain visas — want a specific background colour or only accept studio photos. If the form names a document, check its official rules before you order. SnapID uses advanced AI to verify your photo against 20+ compliance rules in seconds. Upload a photo from your phone, get verified instantly, and download a print-ready 300 DPI image. Works for US, UK, EU, Canada, Australia, India, and 25+ more countries.
Frequently asked questions
How many pixels is a 4×4 cm photo?
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472 × 472 pixels at 300 DPI.
Is 4×4 cm the same as 2×2 inches?
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No. 2×2 inches is 51×51 mm; 4×4 cm is 40×40 mm. You get both sizes in your order.
How many 4×4 cm photos fit on a 4×6 print?
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Six, with cutting margins. An A4 sheet fits 24.
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