Ring Size Calculator

RRB Railway Signature Size, Dimensions & KB Format Guide

Official Railway Recruitment Board (RRB) signature rules, pixel dimensions (140x60 px), KB limits (10-40 KB), and online formatting steps.

Published 17 September 2026 Ring Size Calculator

Railway Recruitment Board (RRB) online application portals enforce stringent digital signature specifications across all major recruitment notifications, including RRB NTPC, Group D, Assistant Loco Pilot (ALP), Junior Engineer (JE), and Technicians. Following exact dimensional parameters ensures hassle-free application submission without registration errors.

RRB Official Guidelines

Railway Portal Signature Specifications

  • File Size Limit: 10 KB to 40 KB
  • Aspect Ratio / Resolution: 140 x 60 pixels
  • Box Dimensions: 50 mm x 20 mm
  • Format: JPG / JPEG (24-bit color)

RRB Exam-Wise Signature Dimension Matrix

Each RRB portal module verifies image metadata upon upload. Below is the official dimensional benchmark across railway recruitment categories:

Railway Notification Allowed KB Range Pixel Dimensions Pen Ink Requirement
RRB NTPC (Non-Technical Popular Categories) 10 KB – 40 KB 140 x 60 pixels Black Ink Pen
RRB Group D (Level 1 Posts) 10 KB – 40 KB 140 x 60 pixels Black Ink Pen
RRB ALP & Technicians 10 KB – 40 KB 140 x 60 pixels Black Ink Pen
RRB Junior Engineer (JE) / Chemical Assistant 10 KB – 40 KB 140 x 60 pixels Black Ink Pen

How to Convert Signature for RRB Portal Online

  1. Prepare Signature Box: Draw a 50 mm x 20 mm rectangular box on a white paper sheet and sign inside using black ink.
  2. Scan or Photograph: Ensure sharp focus with high contrast between ink stroke and white paper background.
  3. Upload to Resizer Tool: Drag and drop your image into our live tool above.
  4. Select Target Preset: Set Width = 140 px, Height = 60 px, and Maximum KB = 30 KB.
  5. Download Form-Ready File: Click download to obtain an optimized JPEG image that bypasses all RRB portal validation filters.

Rules to Avoid RRB Signature Rejection

  • No Signature in Block Letters: Signature must be running handwriting. Block/capital letters will lead to disqualification.
  • Matching Call Letter Signature: Your uploaded signature will be matched against attendance sheets during CBT exams and Document Verification.
  • Avoid Background Overlays: Ensure no camera shadows, ruled lines, or paper texture obscure your signature strokes.