Photo specs
Here is a list of the Comoros passport photo requirements:
Required photo size: 4.5 cm in height and 3.5 cm in width

The photo you submit must be in color
Head size and position: keep your head straight to the camera
Recency: must be as recent as 6 months
Background: white
Smile: no
Eyes: must be clearly visible
Your ears should appear in the photo
The picture must not be blurry
Glasses: only acceptable if they do not obstruct your eyes
Headgear: as a rule, no. Exceptions are possible for religious purposes
Dimensions and size (pixels): at least 600 dpi
Attire, clothing, dress code: avoid white clothes
Beard: allowed only if it reflects your everyday look
Quantity needed in application: 2