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RRB NTPC, Group D, and other railway exam photo specifications for online applications.
Official Requirements for RRB NTPC, Group D, ALP
Photos must meet the specifications published by Railway Recruitment Board.
Last reviewed
May 2026
v1.1
DimensionsPhoto: 3.5 × 4.5 cm (35 × 45 mm). Signature: 3.5 × 1.5 cm
File SizePhoto: 20 KB to 50 KB. Signature: 10 KB to 20 KB
BackgroundPlain white — no shadows or patterns
Head RatioFace must cover most of the frame, clearly visible
FormatJPEG only
ExpressionNeutral expression, ears visible
Additional Requirements
- Sign in black ink on white paper only
- Scan signature at specified size
- Recent photograph (within 6 months)
Source: Railway Recruitment Board — RRB · View official guidelines
Correct vs Incorrect
Use this quick comparison to check your photo before uploading.
| Check | ✓ Correct | ✗ Incorrect |
|---|---|---|
| Photo Size | 35 × 45 mm, JPEG | Wrong dimensions or format |
| Signature Size | 35 × 15 mm | Wrong size (e.g. using SSC format) |
| Photo File Size | 20–50 KB, JPEG | Over 50 KB |
| Signature Ink | Black ink on white paper | Blue ink or coloured paper |
Common Mistakes to Avoid
Signature wrong orientation
Railway signature must be 3.5 × 1.5 cm. Many candidates use SSC dimensions (4.5 × 3.5 cm) which is wrong.
Photo too large
The 50 KB limit is strict. Compress your photo before uploading.
Blue ink signature
Only black ink on white paper is accepted. Blue ink signatures are rejected.
Wrong background
Railway strictly requires a white background. No exceptions for coloured walls.
Frequently Asked Questions
What are the RRB photo dimensions?
The photo must be 3.5 × 4.5 cm (35 × 45 mm) in JPEG format. File size: 20–50 KB.
What are the signature dimensions for railway exams?
The signature must be 3.5 × 1.5 cm. Sign in black ink on white paper and scan at 10–20 KB in JPEG format.
What background is required?
A plain white background. Stand against a white wall with even front lighting.
Can I wear glasses?
It is recommended to remove glasses. Ensure ears are visible if possible.
What file format is accepted?
Only JPEG format is accepted for both photo and signature uploads.
Also consider
- SSC CGL Photo Size & Requirements
- IBPS Photo Guidelines — PO, Clerk & SO — IBPS has the same photo specs but its signature matches SSC format rather than railway.
- UPSC Photo Requirements — UPSC uses similar passport-style photos with a larger file size allowance (300 KB).