Scale I Officers Signature Size
Requirements (2026)
Complete official signature specifications for Central Bureau of Investigation 2026 application. Signatures that don't meet these rules will be rejected by the upload portal.
Official CBI Signature Specifications
| File Size | 10KB – 20KB |
| Format | JPEG / JPG |
| Dimensions | 140 × 60 pixels |
| Ink Color | black |
| Paper | Plain white (no lines, no ruled paper) |
Additional Requirements
- MANDATORY: Signatures in CAPITAL LETTERS will be summarily rejected.
- Must be signed on white paper with Black Ink pen only.
- Must not be smudged or overwritten.
Why Signatures Get Rejected on the CBI Portal
Signature exceeds 20KB
High-resolution phone scans often exceed 20KB. The portal blocks any file above this limit.
Wrong ink color used
CBI mandates black ink. Blue or pencil signatures are a common rejection reason.
Signed on lined or ruled paper
Notebook lines visible in the scan are treated as tampering. Always use plain, unruled white paper.
Frequently Asked Questions
What is the exact signature file size for Scale I Officers 2026?
The official signature file size for Scale I Officers is 10KB to 20KB in JPEG/JPG format. Dimensions must be exactly 140 × 60 pixels.
What ink color is required for CBI signatures?
CBI requires signatures in black ink on plain white paper for the 2026 application process.
Can I use a digital signature for Scale I Officers?
Most government exam portals do not accept digital signatures. You should sign on plain white paper with black ink, scan or photograph it, and then use our compressor to meet the exact size requirements.
Need to Compress Your Signature?
Our free tool automatically compresses your signature scan to meet the exact CBI 2026 specifications listed above.
Use CBI Signature Compressor