Signature Size Requirements for SSC, IBPS, UPSC & Railway
A signature upload usually fails for one of three reasons: the file is too big, the dimensions don't match, or the format isn't accepted. This page collects the signature specifications commonly seen across major Indian government and banking exams, so you have one place to check before digging through a full notification PDF.
Last updated: August 2026
Every recruitment board publishes its own numbers, so a signature that works for one exam's portal can still fail another's, even if it looks fine to you. The tables and sections below are a reference to check before you upload.
Common reference only
Signature requirements can change between exams and between recruitment cycles for the same exam. Always confirm the exact file size, dimensions, and format against the official notification for your specific application before uploading.
Quick answer
Many Indian exam and recruitment forms commonly require a JPG/JPEG signature within a specified KB range and pixel size. A file of roughly 10–20 KB at dimensions around 140×60 pixels is common in several applications, but the exact numbers vary by exam and by notification — check yours before uploading.
Why these requirements exist
Recruitment portals don't set size limits arbitrarily. Two things are typically happening on the backend:
- Automated validation. The portal checks file size, dimensions, and format at the moment of upload — before anyone reviews the form manually. A file that's even a few KB over the limit is usually rejected outright.
- Signature verification. Depending on the exam and its process, your uploaded signature may later be checked against a signature you provide at another stage — such as the exam hall or document verification — so a signature that's stretched, over-compressed, or otherwise unclear can create problems beyond just the initial upload.
Getting the size and clarity right the first time avoids both kinds of issues.
Signature requirements at a glance
Reference only — confirm exact figures against your exam's current notification.
| Exam / Board | Format | Typical File Size | Typical Dimensions |
|---|---|---|---|
| SSC (CGL, CHSL, MTS, GD) | JPG/JPEG | 10–20 KB | ~140×60 px |
| IBPS (PO / Clerk / SO) | JPG/JPEG | 10–20 KB | ~140×60 px |
| UPSC (Civil Services, CDS, NDA) | JPG/JPEG | 20–50 KB | ~140×60 px |
| Railway (RRB, NTPC, Group D) | JPG/JPEG | 10–20 KB | ~140×60 px |
| CTET | JPG/JPEG | 10–20 KB | ~140×60 px |
| UGC NET | JPG/JPEG | 10–20 KB | ~140×60 px |
| SBI (PO / Clerk) | JPG/JPEG | 10–20 KB | ~140×60 px |
| LIC | JPG/JPEG | 10–20 KB | ~140×60 px |
RBI and NABARD generally follow a similar JPG and file-size pattern to IBPS and SBI — confirm the exact limit against their specific notification, since it isn't always published on a separate dedicated page.
SSC signature size requirements
SSC exams (CGL, CHSL, MTS, and others) commonly ask for a JPG/JPEG signature in the 10–20 KB range, around 140×60 pixels. Check the exact figures in your specific SSC notification, since limits can be adjusted between recruitment cycles.
- Sign in black or blue ink on plain white paper.
- Crop tightly so the signature stays legible within a small pixel box.
- Keep the final file within the stated KB range — don't assume the portal will auto-compress an oversized file for you.
IBPS signature size requirements
IBPS (PO, Clerk, Specialist Officer) commonly uses a similar specification to SSC — JPG/JPEG, roughly 10–20 KB, ~140×60 px. IBPS forms usually list photograph and signature requirements separately, so check both individually rather than assuming they share the same limit.
- Confirm the current KB and dimension limits in your specific IBPS notification.
- Keep the signature centered rather than skewed toward one edge.
UPSC signature requirements
UPSC applications (Civil Services, CDS, NDA) commonly allow a somewhat larger file — around 20–50 KB — at similar pixel dimensions to other exams.
- Follow the active application's format instructions closely, since UPSC forms are detailed and specific to each recruitment.
- Use a recent signature rather than an old scanned copy.
- If you're unsure whether to use JPG or PNG, see JPG vs PNG for Signature Upload.
CDS signature requirements
CDS (Combined Defence Services) runs through the UPSC application system, so it generally follows UPSC's format conventions — but candidates applying for IMA, INA, Air Force Academy, or OTA should check the KB and pixel limits in the active CDS notification specifically, as these can differ from the general UPSC civil services form.
Don't assume a signature file sized for NDA will work for CDS — the two are published as separate notifications and can set different limits.
Railway (RRB) signature requirements
Railway recruitment (RRB NTPC, Group D, and other RRB exams) generally follows the same range as SSC and IBPS — JPG/JPEG, 10–20 KB, ~140×60 px.
- Notification specifics can differ slightly between individual RRB recruitment drives — check the one you're applying under.
- Keep a saved copy of your correctly sized signature so you don't have to redo the process if a form session times out.
CTET signature requirements
CTET generally follows the common 10–20 KB, JPG/JPEG range used by most other boards.
- Use dark, clearly visible ink and avoid faded signatures so the image stays readable after resizing.
- Double-check the current CTET notification, as it's revised for each cycle.
UGC NET signature requirements
UGC NET applicants should confirm the specific KB and pixel limits in the current notification before submitting — the commonly seen 10–20 KB, JPG/JPEG range is a reasonable starting point, but board-specific instructions take priority.
SBI and banking exam signature requirements
Banking recruitment — SBI, IBPS, RBI, NABARD, LIC — generally follows shared conventions across boards: JPG/JPEG format and a small file size, typically in the 10–20 KB range.
RBI and NABARD notifications don't always have a dedicated public reference page, so starting from the IBPS or SBI specification and confirming against your specific notification is a reasonable approach.
Other competitive exams (NDA, AFCAT, CAT, CLAT)
These generally follow the same JPG/JPEG, small-file-size pattern, though exact pixel dimensions can vary by board — check each notification directly.
Common signature upload mistakes
| Mistake | Why it causes rejection |
|---|---|
| Photo taken in poor lighting | Signature may be too unclear to pass validation or later review |
| Excessive white space around the signature | Pushes file size and dimensions out of range once resized |
| Wrong format (PNG/PDF where JPG is required) | Portal validation typically rejects the file before submission completes |
| Ignoring the KB limit | One of the most common causes of "upload failed" errors |
| Over-compressing to hit a small KB target | Signature can become too degraded to stay clearly legible |
If you're already stuck on a failed upload, see the full Signature Upload Failed — Fix Guide.
Tips for a signature that passes on the first try
- Sign on plain white paper with black or dark blue ink.
- Take the photo directly overhead, in even lighting — see How to Scan a Signature for Online Forms.
- Crop tightly around the signature — see How to Crop a Signature for Online Forms.
- Save as JPG unless your specific notification says otherwise — see JPG vs PNG for Signature Upload.
- Check the exact KB and pixel numbers in your notification before you upload, not after it fails.
Final thoughts
The exact numbers differ across SSC, IBPS, UPSC, Railway, CTET, UGC NET, and banking forms, but the goal is the same everywhere: a clear, correctly formatted signature within the required file size. Check the specific requirement for your exam, resize accordingly, and confirm against the official notification before you submit.
Frequently Asked Questions
What is the signature size for SSC exams?
SSC commonly asks for a JPG/JPEG signature in the 10–20 KB range, around 140×60 pixels — confirm the exact figures in your current SSC notification, as they can be adjusted between cycles.
Is the IBPS signature size the same as SSC?
IBPS generally uses a similar range to SSC — roughly 10–20 KB, ~140×60 px — but confirm against the active IBPS notification for your specific post, since photograph and signature specs are usually listed separately.
What is the UPSC signature size limit?
UPSC commonly allows a somewhat larger file, around 20–50 KB, at similar pixel dimensions — this generally applies to civil services, CDS, and NDA applications submitted through the UPSC portal, but check the specific notification.
Do all government exams use the same signature format?
No. Most use JPG/JPEG with broadly similar dimensions, but exact file size limits vary by board and by recruitment cycle — this page's table is a starting reference, and the official notification is always the final word.
Why does my signature upload keep failing even though it looks fine?
Usually one of three things: the file size is outside the allowed range, the pixel dimensions don't match, or the format isn't accepted. A resizer tool that lets you set an exact KB target helps avoid all three.
Can I use one resized signature file for multiple exams?
Only if both exams specify the same format, size range, and dimensions — check each notification rather than assuming, since a mismatch can cause a second application to fail even after the first one succeeded.
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