IBPS photo, 20–50 KB
Use a recent passport-style colour picture on a light, preferably white, background. Look straight at the camera.
IBPS also captures a live photo. This JPEG is the uploaded file, not that live step.
What usually goes wrong
Caps, hats, and dark glasses are rejected. The face must be large enough to see clearly at 200×230.
What this page checks
JPEG, preferred 200×230 pixels, file between 20 KB and 50 KB. A file under 20 KB fails the minimum.