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Left thumb impression size for IBPS: 240×240 pixels, 20KB–50KB
IBPS application portals — PO, Clerk, RRB and SO alike — accept the left thumb impression only as a JPG/JPEG between 20KB and 50KB, at 240 × 240 pixels scanned at 200 DPI (3cm × 3cm). Press your left thumb in black or blue ink on plain white paper, lift cleanly, photograph or scan it in good light, and upload it here. The tool crops your selection to a perfect square, resizes to exactly 240 × 240, and binary-searches JPEG quality until the file lands inside the 20–50KB window the portal demands.
How to take a clean thumb impression at home
Use a stamp pad or spread ballpoint ink evenly on the thumb — black or blue only. Press firmly once on white paper without rolling or sliding, so the ridge pattern stays sharp instead of smudging. Photograph it from directly above in daylight, fill the frame with the impression, and avoid shadows across the paper. A smudged or faint impression gets flagged during document scrutiny even if the file uploads successfully, so retake the print rather than trying to rescue a bad one.
SBI, RBI and other banking exam thumb specs
SBI's 2026 advertisements use the same 240 × 240 px, 20–50 KB thumb spec as IBPS. RBI figures for this cycle aren't listed here yet — the IBPS/SBI preset is a common starting point; set the exact size from your RBI notification.
No left thumb? What IBPS rules say
Per the official IBPS upload guidelines: if you don't have a left thumb, use the right thumb. If both thumbs are unavailable, use a finger of the left hand starting from the forefinger; if no left-hand fingers, a right-hand finger; and if no fingers are available, the left toe impression is accepted. In every such case, specify in the uploaded document which finger or toe was used and of which hand. This tool processes any of these impressions identically.
Thumb Impression Size for SSC, UPSC and Bank Exams
Thumb impressions are uploaded mainly on banking forms. IBPS and SBI specify 240 × 240 pixels at 200 DPI (3 cm × 3 cm), JPG/JPEG, 20–50 KB; AFCAT asks for 50–100 KB with men using the left thumb and women the right. SSC and UPSC forms do not ask for a thumb upload. Always check your notification before uploading.
Left Thumb or Right Thumb — Which One to Upload
Banking forms (IBPS, SBI) ask for the left thumb; if you don't have one, use the right thumb and note it. AFCAT asks men for the left thumb and women for the right. Follow the instruction line on your own form.
How to Fix 'File Size Too Large' Errors on Exam Portals
If the portal rejects your thumb impression for being too large, the fix is compression to the target KB range, not cropping alone. Upload your scanned image here, select your exam preset or enter the KB limit manually, and download the resized file. The tool adjusts JPEG quality and pixel dimensions together so the output lands inside the accepted range while the impression ridges stay legible. If your file is too SMALL (below the minimum KB), use our Increase Image Size KB tool instead — portals enforce minimums as strictly as maximums.
Frequently asked questions
What is the thumb impression size for IBPS PO and Clerk?
240 × 240 pixels at 200 DPI (3cm × 3cm), JPG/JPEG format, between 20KB and 50KB — left thumb in black or blue ink on white paper. The IBPS preset here targets exactly these figures.
Which thumb do I use for the impression?
The left thumb. If you don't have one, IBPS rules allow the right thumb, then left-hand fingers from the forefinger, then right-hand fingers, then the left toe — with a note in the upload specifying which was used.
Why does the portal reject my thumb impression file?
Usually wrong file size (over 50KB or under 20KB), wrong format (PNG or HEIC instead of JPG), or wrong dimensions. This tool fixes all three: exact 240 × 240 pixel output, JPG encoding, and compression targeted inside the 20–50KB window.
Can I use blue ink for the thumb impression?
Yes — IBPS guidelines accept black or blue ink on white paper. What matters more is a firm, unsmudged press with clearly visible ridge lines.
Is my thumb impression uploaded to a server?
No. Cropping, resizing and compression all run inside your browser — a biometric identifier is exactly the kind of file that should never touch a third-party server.
Angutha nishan ka size kaise kam kare?
Upload a scan of your left thumb impression and pick your exam preset — the tool crops to a perfect square, resizes to 240 × 240 pixels, and compresses inside the 20–50KB window.
Ghar par saaf angutha nishan kaise le?
Use a stamp pad or evenly spread black or blue ink, press firmly once on white paper without rolling, and photograph it from directly above in daylight. A smudged impression gets flagged during document scrutiny even if the file uploads fine.
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