Official Guidelines for Left Thumb Impression (LTI) Upload
Every year, over 10 million aspirants apply for banking exams conducted by the Institute of Banking Personnel Selection (IBPS) and the State Bank of India (SBI). In addition to a passport photo and signature, banking portals mandatorily require a clear Left Thumb Impression (LTI) to verify candidate identity and prevent impersonation during online computer-based tests (CBT).
Official Examination Specifications Table
| Exam Body | Dimensions | File Size (KB) | Ink Color |
|---|---|---|---|
| IBPS PO / Clerk / SO | 240 × 240 pixels (3 × 3 cm) | 20 KB – 50 KB | Blue or Black |
| SBI PO / Clerk | 240 × 240 pixels (3 × 3 cm) | 20 KB – 50 KB | Blue or Black |
| Railway RRB (ALP, NTPC) | 240 × 240 pixels | 30 KB – 49 KB | Blue or Black |
| State Police & PSC | 3.0 × 3.0 cm square | 20 KB – 50 KB | Blue or Black |
4 Tips to Avoid Thumb Impression Rejection
- Do Not Over-Ink: Gently tap your thumb onto the stamp pad. If there is excess ink, press it once on a scrap paper before stamping on your final submission sheet to prevent smudged lines.
- Use Plain White Paper: Do not use ruled or lined notebook paper. Lines intersecting with your fingerprint ridges trigger automatic software validation errors.
- Ensure Adequate Lighting: When snapping a phone photo, avoid shadows from your hand or mobile device. Our built-in "Clean Paper & Sharpen Ink" tool automatically strips minor shadows.
- Verify Exact Size: Confirm that the downloaded file weight is above 20KB and below 50KB. SizeSnap automatically enforces this range.
Complete Bank Application Toolkit
Need to format all 4 documents for your banking registration? Check out our dedicated IBPS & SBI 4-in-1 Bank Exam Resizer for Passport Photo, Signature, Thumb Impression, and Handwritten Declaration.