Bank exams such as IBPS PO, IBPS Clerk, SBI PO and RBI Assistant ask for two uploads besides the photo and signature: a left thumb impression and a handwritten declaration. In the 2026 notices the thumb is 240 × 240 px (3 × 3 cm at 200 DPI) within 20–50 KB, and the declaration is 800 × 400 px (10 × 5 cm at 200 DPI) within 50–100 KB.
Which exams ask for them
The same thumb and declaration sizes appear in IBPS PO 2026, IBPS Clerk 2026, IBPS RRB 2026, IBPS SO 2026, SBI PO 2026, SBI Junior Associates 2026 and RBI Assistant 2026, and in LIC AAO 2025 and NABARD Grade A 2025. In the IBPS notices the pixel size is the preferred one and the KB range is the hard limit.
| Upload | Preferred size | KB range | Format |
|---|---|---|---|
| Left thumb impression | 240 × 240 px (3 × 3 cm, 200 DPI) | 20–50 KB | JPG / JPEG |
| Handwritten declaration | 800 × 400 px (10 × 5 cm, 200 DPI) | 50–100 KB | JPG / JPEG |
The thumb impression
- Use your left thumb, with black or blue ink, on white paper.
- Press once and lift straight up. The print must not be smudged; LIC AAO 2025 and NABARD 2025 say so directly.
- If you have no left thumb, use the right thumb. The IBPS notices go further: if neither thumb is available, use left-hand fingers starting from the forefinger, then right-hand fingers, then the left toe, and state what you used.
- Crop to a square around the print, with a little white space on each side.
The handwritten declaration
You copy a fixed text from the notice in your own handwriting. In IBPS PO 2026 it reads:
"I, ______ (Name of the candidate), hereby declare that all the information submitted by me in the application form is correct, true and valid. I will present the supporting documents as and when required."
The wording is not the same everywhere. SBI PO 2026 adds your date of birth and a sentence saying that the signature, photograph and left-hand thumb impression are yours, and IBPS RRB 2026 says "submit" instead of "present". Copy the text from your own notice word for word.
- Write in English, in your own handwriting, not in CAPITAL LETTERS.
- Use a black pen on white paper. LIC AAO 2025 also allows blue.
- Candidates who cannot write may type the text and put their left thumb impression below it, as the notices allow.
- Write in a wide block, because the image is twice as wide as it is tall.
Scanning both
Scan, or photograph in daylight with the phone held flat above the paper and no shadow. Crop tight, make the paper white, resize to the preferred size and save within the KB range. The declaration needs at least 50 KB, so do not compress it too hard; a file that is too small is refused just like one that is too big.
What to do next
Use the thumb impression resizer and the declaration resizer, which already have the bank sizes. Each exam page, for example IBPS PO, lists every upload with its source.