RRB Railway Exam Photo & Signature Requirements Guide (NTPC, Group D, ALP)

Q: What is the signature size required for RRB NTPC and Group D?

Signatures must weigh between 10KB and 20KB, measuring roughly 140 × 60 pixels on a clean white background.

Official Railway Recruitment Board rules for RRB NTPC, Group D, and ALP photo (30-50KB) and signature (10-20KB) uploads and dimensions.

GuidesRailway RRBNTPCGroup D

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RRB Railway Exam Photo & Signature Requirements Guide (NTPC, Group D, ALP)

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The Railway Recruitment Boards (RRB) conduct massive hiring drives across India for positions including RRB NTPC (Graduate & Undergraduate), Group D (Level 1), ALP (Assistant Loco Pilot), and Technician.

The RRB application portal enforces strict lower limits on file size. Unlike many portals that accept photos down to 20KB, RRB specifically requires photos between 30KB and 50KB. Photos under 30KB are automatically rejected by the portal's file pre-validator.

Here are the official specifications and instructions to prepare your railway recruitment photos without errors.

Official Portal Verification Notice: Photo specifications are issued in official RRB Centralized Employment Notices (CEN). Always cross-reference your specific CEN on official regional RRB websites.

1. RRB Railway Photograph Specifications#

File Size Window: 30 KB to 50 KB (Note the strict 30KB minimum threshold).
Physical Dimensions: 35 mm × 45 mm (3.5 cm × 4.5 cm).
Digital Resolution: Minimum 320 × 240 pixels up to 413 × 531 pixels.
Background: Clear, plain white or very light background.
Lighting & Features: Full frontal portrait with both ears visible, neutral expression, and no shadows across face or background.
Prohibited Items: Caps, dark sunglasses, masks, or headgear (except religious headwear where the full facial oval is unblocked).

2. RRB Railway Signature Specifications#

File Size Window: 10 KB to 20 KB.
Dimensions: Approximately 140 × 60 pixels or 400 × 200 pixels.
Ink & Paper: Black or dark blue ink on plain unruled white paper.
Format: Cursive running hand. Block capital letters are strictly invalid.

Why RRB Rejects Photos Below 30KB#

Many candidates compress their photo down to 20KB or 25KB, only to receive the error "File size must be between 30 KB and 50 KB".

The Railway portal's admit card printing pipeline utilizes thermal printers that require a higher minimum pixel density to prevent jagged pixelation on printed exam passes. Always target 38KB to 45KB for RRB uploads.

Formatting RRB Photos with FileZenith#

Open FileZenith's RRB Railway Photo Resizer.
Upload your photograph.
The studio automatically locks dimensions to the official 35 × 45 mm frame.
The client-side compression engine regulates file weight to land cleanly inside the 35KB–45KB sweet spot.
Download your ready-to-upload JPEG in under 5 seconds.

Frequently Asked Questions (FAQ)#

Why does the RRB portal reject my photo under 30KB?

Railway Recruitment Board validation scripts explicitly require uploaded photos to weigh at least 30KB to guarantee clear, high-resolution printing on examination admit cards and attendance sheets.

Can I wear glasses in my RRB photo?

Clear prescription spectacles are permitted, provided there are no flash glare or reflections obscuring the eyes. Tinted or colored glasses are strictly forbidden.