RRB Signature Size Guide 2026 – Railway Signature Requirements for All Exams

Understanding RRB Signature Requirements

The Railway Recruitment Board (RRB) conducts recruitment exams for a wide range of positions across Indian Railways — from Non-Technical Popular Categories (NTPC) to Group D, Assistant Loco Pilot (ALP), Junior Engineer (JE), and Technician. Each recruitment is issued under a specific Centralised Employment Notice (CEN) number, and signature requirements can vary between notifications.

Across all RRB exams, the signature must be in running handwriting (natural cursive style). BLOCK or capital letters are strictly prohibited — this is the single most common reason for signature rejection in railway applications. The file must be in JPEG/JPG format with a white background, and the file size typically falls between 10 KB and 40 KB.

RRB NTPC Signature Size (CEN-06/2025 & CEN-07/2025)

The RRB NTPC (Non-Technical Popular Categories) recruitments have different signature specifications depending on the CEN number. For CEN-06/2025, the prescribed signature dimensions are 35 mm × 20 mm, which equates to approximately 140 × 60 pixels at standard resolution. The file size should be between 10 KB and 40 KB (some CENs specify 30-49 KB at 100 DPI). For CEN-07/2025, the signature dimensions are 5.0 cm × 2.0 cm (~200 × 80 pixels) with a file size of 10-40 KB. Both require JPEG/JPG format.

RRB Group D Signature Size

RRB Group D (Level 1 posts) requires a signature of 3.5 cm × 1.5 cm (~140 × 60 pixels) with a file size of 10-40 KB in JPEG/JPG format. The Group D portal validates these parameters at the time of upload. Group D is one of the largest railway recruitments, and signature rejection due to incorrect format or block letters is very common in this exam.

RRB ALP, JE & Technician Signature Size

RRB ALP (Assistant Loco Pilot), RRB JE (Junior Engineer), and RRB Technician recruitments each have their own CEN notification with specific signature requirements. While most follow the standard ~140 × 60 pixels and 10-40 KB in JPEG format, candidates must always verify the exact dimensions from the specific CEN notification PDF. The running handwriting rule applies across all RRB exams without exception.

Critical RRB Signature Rules

How to Resize Your Signature for RRB Exams

1. Sign on a plain white paper using black ink. Ensure your signature is in natural running handwriting — not BLOCK letters.
2. Scan or photograph the signature in good lighting. Keep the signature approximately 4-5 cm wide for best results.
3. Visit our free Signature Resizer tool.
4. Upload your signature image.
5. Enter the exact dimensions from your RRB notification — e.g., 140 × 60 (for most exams) or 200 × 80 (for CEN-07/2025).
6. Set maximum file size to 40 KB (or as specified in your notification).
7. Select JPG (Standard) format.
8. Click Resize Signature and download the optimized file.
9. Upload the downloaded signature to the RRB portal and verify the preview before final submission.

RRB Signature Tips for 2026

• Always check the CEN notification PDF for the exact signature dimensions — requirements vary between CEN numbers.
• Keep a separate signature file for each RRB exam with the exam name in the filename (e.g., rrb_ntpc_signature.jpg).
• Test your signature on the RRB portal preview before final submission — zoom in to check legibility at 100%.
• Avoid using the same signature for RRB and other exams — RRB has unique rules (e.g., name/date stamp on photo).
• If your signature is rejected, check if you used running handwriting first — this alone causes 40%+ of RRB rejections.

For more details on signature requirements for other exams, see our SSC Signature Size Guide and IBPS Signature Size Guide.

What is the RRB NTPC signature size for CEN-06/2025 and CEN-07/2025?

For RRB NTPC CEN-06/2025, the signature dimensions are 35×20 mm (~140×60 px) with a file size of 10-40 KB (some CENs specify 30-49 KB at 100 DPI). For CEN-07/2025, dimensions are 5.0×2.0 cm (~200×80 px) with 10-40 KB. Both require JPEG/JPG format.

Does RRB accept signatures in BLOCK letters?

No. RRB portals explicitly require signatures in running handwriting only. Signatures in BLOCK or capital letters are one of the top rejection reasons for railway applications.

What is the RRB Group D signature size?

RRB Group D requires a signature of 3.5×1.5 cm (~140×60 px) with a file size of 10-40 KB in JPEG/JPG format.

What format is required for RRB signature upload?

RRB requires signatures in JPEG/JPG format only. The signature must be in black ink on plain white paper with a clear white background.

Why is my RRB signature getting rejected?

Common rejection reasons include: BLOCK letter signature instead of running handwriting, wrong dimensions, file size outside 10-40 KB range, missing name/date stamp on photo, colored background, or blurred/illegible signature.

What is the RRB ALP signature size requirement?

RRB ALP (Assistant Loco Pilot) signature requirements are specified in the official notification. Typically, the format follows 10-40 KB in JPEG/JPG format. Always check the specific CEN notification for exact pixel dimensions.

Can I use the same signature for RRB NTPC and RRB Group D?

Both exams generally use ~140×60 px dimensions, but you should verify the exact specifications from each notification. CEN-07/2025 requires 5.0×2.0 cm (~200×80 px), which differs from the standard.

How do I resize my signature for RRB railway exams?

Upload your signature to our free Signature Resizer, enter the required dimensions from your RRB notification (e.g., 140×60 or 200×80 px), set max file size to 40 KB or as specified, select JPG format, and click Resize. Download and upload to the RRB portal.