IBPS Left Thumb Impression Size: 240x240 px, 20–50 KB

The IBPS left thumb impression size is 240 x 240 pixels at 200 DPI (about 3 cm x 3 cm), saved as a JPG/JPEG between 20 KB and 50 KB. It should be your left thumb, pressed in blue or black ink on white paper, with the ridges clearly visible. The same spec has applied to IBPS PO, Clerk, SO and RRB forms and to SBI forms in recent cycles, but confirm it in your notification.

IBPS thumb impression specs at a glance

These values come from recent IBPS notices, as also used by SBI. Our IBPS and SBI upload size guide covers the photo, signature and declaration as well.

How to take a thumb impression at home

The quality of the print matters more than any resizing. A clean print takes two minutes.

1. Get a stamp pad with blue or black ink. A new pad gives an even coat; an old, dry one leaves gaps.
2. Wash and dry your left thumb. Oil or lotion on the skin smudges the print.
3. Press the thumb on the pad lightly, rolling it slightly from side to side so the whole pad of the thumb is inked. Do not soak it.
4. Press it on plain white paper firmly, without sliding. Lift straight up.
5. Make three or four prints side by side and pick the clearest one, where you can see the lines (ridges) rather than a solid blob.

Too much ink gives a dark patch; too little gives a faint, broken print. If the first print is a blob, press once on scrap paper to remove extra ink, then make the real one.

How to photograph or scan it

• Shoot in daylight, with the flash off, holding the phone directly above the paper.
• Get close enough that the thumb print fills a good part of the frame, then tap to focus on it.
• If you have a scanner, 200 DPI matches what the notice describes.

Phone photo or scanner?

Either works. A scanner at 200 DPI gives an even, shadow-free image, but most applicants use a phone, and that is fine. The resizer brings both to the same 240 x 240 px size. What matters is that the print is sharp and evenly lit. If your phone photo shows a shadow from your hand or the phone, move so the light comes from the side, or place the paper near a window.

How to resize the thumb impression for IBPS

1. Open the IBPS thumb impression resizer and choose your photo.
2. The tool crops the centre to a square, resizes it to 240 x 240 px and compresses it to 20–50 KB. The black & white option is on by default, which strengthens the ridges.
3. If the print is not in the centre of your photo, crop it first with crop image using the Square 1:1 ratio, leaving a little white space around the print.
4. Download thumb.jpg and zoom in. You should see ridges, not a blob.

If the print looks pale even after resizing, run it through black and white image and raise the contrast before you resize.

Thumb impression resize to 20 KB

Searches for "IBPS thumb impression resize 20 KB" are common, but 20 KB is the minimum, not the target. A 240 x 240 thumb print is mostly white paper and often compresses to well under 20 KB, which the portal rejects. The resizer handles this: if the file comes out below 20 KB, it adds harmless padding data to reach the minimum, without changing the picture. The note under the result tells you when this has happened.

IBPS RRB, PO and Clerk: any difference?

In recent cycles there has been no difference: IBPS RRB (Officer Scale I and Office Assistant), PO, Clerk and SO forms all ask for the left thumb impression at 240 x 240 px and 20–50 KB. SBI PO and Clerk forms have used the same. Specs are set in each notification, so check before uploading.

What if you cannot give a left thumb impression?

Some bank notices have allowed the right thumb, or other arrangements, for candidates who cannot give the left thumb impression, for example because of an injury or disability. Guides disagree on the exact wording, so follow your notification. If it is silent, contact the helpdesk listed in it before you submit rather than uploading something else.

Candidates who cannot write have also been allowed by IBPS to give a thumb impression below a typed declaration. That is covered in our handwritten declaration format guide, and the IBPS declaration resizer makes the declaration file.

Common reasons thumb impressions get rejected

• Smudged blob with no visible ridges.
• Right thumb or another finger used without the notice allowing it.
• Ink other than blue or black, such as red or green.
• Coloured or ruled paper.
• File outside 20–50 KB, including too small.
• Thumb impression uploaded in the signature box, or the other way round. Name your files thumb.jpg, sign.jpg, photo.jpg and declaration.jpg.
• Blurry photo from shooting too close without focusing.

Keep it for later

The bank may compare your thumb impression at the exam or at joining. Keep the original paper print and the final thumb.jpg with your other application files, and reuse the same file for other IBPS and SBI forms in the same year if the specs have not changed.

Questions