This is the commonly used size: we found no requirement published by the institution. Confirm it before your application.
Tips to get it right the first time
Colour photo with a plain expression, against a plain light background.
No sunglasses, no other people in the frame, and no shadows or red-eye.
Your face must be uncovered unless you cover it for religious or medical reasons.
How to do it with Requisito Listo
Open the «Voter Authority Certificate photo» template in the app.
Take the photo with the on-screen guide (or pick one from your gallery).
The app centers your face, makes the background white and gets the exact size and file weight.
Check the checklist, then upload or save it.
At the end you'll see a checklist: size, file weight, background and format. If something doesn't comply, it tells you what to fix before the portal rejects it.