All photo formats / India
OCI card signature image
The OCI application asks for a signature image three times as wide as it is tall: between 200 x 67 and 900 x 300 pixels, JPEG, at most 200 KB. Minors who cannot sign use a left thumb impression in black or blue ink instead.
The official requirements
| Dimensions | Aspect ratio 3:1; 200 x 67 px minimum, 900 x 300 px maximum (this tool outputs 600 x 200) |
|---|---|
| File format | JPEG / JPG |
| File size | 200 KB maximum |
| Ink | Black or blue pen on white paper |
| Minors | Left thumb impression if the child cannot sign |
Checked against the official sources below on 7 Nov 2026.
How to do it
- Sign in black or blue ink on white paper.
- Photograph or scan it, upload below, and crop tightly around the signature.
- Create the file, confirm the checklist, download and upload it with your OCI application.
Common questions
What are the exact OCI signature dimensions?
The portal checks the aspect ratio (3:1) and a bounding box: at least 200 x 67 px, at most 900 x 300 px, JPEG, max 200 KB.