Signature Size for SSC CGL: 10KB to 20KB JPG – Complete Guide

If you are applying for the Staff Selection Commission Combined Graduate Level (SSC CGL) exam in 2026, you already know how rigorous the application process is. Among the myriad of details you must get right, the signature upload is notoriously strict.

A single mistake in the dimensions, ink color, or file size (which must be strictly between 10KB and 20KB) can lead to the outright rejection of your application. In this complete guide, we will walk you through exactly how to prepare, scan, and resize your signature to meet these uncompromising standards.

The Official 2026 SSC CGL Signature Requirements

Before you even touch a digital tool, you must understand what the SSC expects from your signature file.

• File Format: JPEG or JPG only. PNG or PDF files will not be accepted.
• File Size: Minimum 10 KB, Maximum 20 KB.
• Image Dimensions: Approximately 4.0 cm width x 2.0 cm height. (In pixels, this translates to roughly 140 x 60 pixels).
• Visibility: The signature must be clear and legible. A blurry or microscopic signature is grounds for rejection.
• Ink and Paper: The signature must be done on plain white paper (unruled) using a Black ink pen.

How to Capture the Perfect Signature

The biggest mistake applicants make is taking a poorly lit smartphone photo of their signature. Follow these steps to get a clean source image:

1. Use White Paper: Take a fresh, unruled piece of white paper. Do not use notebook paper with lines.
2. Use a Thick Black Pen: A gel pen or a bold ballpoint pen works best. It provides the high contrast needed for digital scanning.
3. Sign Naturally: Do not write in block letters. Your normal running handwriting is required.
4. Scan, Don't Snap: Instead of taking a photo, use a document scanner app (like Adobe Scan or Google Drive Scanner) on your phone. This ensures the background is pure white and the ink is stark black, avoiding shadows.

Step-by-Step: Compressing to 10KB-20KB

Once you have your scanned signature, it will likely be around 500KB or more. Here is how you can use the Utilifyx 10KB Image Compressor to hit the sweet spot:

Step 1: Crop the Empty Space

Before compressing, crop the image so only the signature is visible. Leaving vast amounts of white space around the signature wastes file size limits. You can do this in your phone's default gallery app.

Step 2: Upload to Utilifyx

Navigate to our free compressor tool and select your cropped signature file.

Step 3: Set the Target Size

Input a target size. We highly recommend aiming for 15KB. This sits safely in the middle of the 10KB and 20KB limit, ensuring you don't accidentally fall below or exceed the boundaries.

Step 4: Download and Verify

The tool will automatically adjust the JPG compression levels to hit 15KB while maintaining the crispness of your black ink. Download the file and check its properties on your computer to verify it reads between 10KB and 20KB.

Common Signature Rejection Reasons

Over 5% of SSC applications face scrutiny due to poor image uploads. Avoid these common pitfalls:

• Blue Ink: While acceptable in some bank exams, SSC heavily prefers black ink. Play it safe.
• Too Small: If you upload a massive photo of an entire page with a tiny signature in the corner, your signature will be unreadable when the portal shrinks the image.
• Capital Letters: Signing entirely in BLOCK CAPITALS is not considered a valid signature by the commission.

Next Steps for Your Application

Once your signature is sorted, don't forget that your passport photo has its own strict guidelines (20KB to 50KB). If you haven't prepared your photo yet, jump over to our Guide to Compressing Photos to 20KB to ensure both of your uploads are flawless.

Applying for exams is stressful enough without fighting with technology. Use the right tools, follow the guidelines, and focus on your preparation!