+1(514) 937-9445 or Toll-free (Canada & US) +1 (888) 947-9445
But isn’t it 3.5X4.5?
For online applications:
When applying to renew or correct a permanent resident card through your online account, the requirements for digital photos are the following: (This applies to eAPR too)

*Format: JPEG

*File size: 5 megabytes maximum, saved directly from the original file captured by the camera

*Image size: 1 680 pixels high by 1 200 pixels wide

*Chin-to-crown ratio: 50 percent of the image height

*Subject position: The chin should be as close as possible to an imaginary horizontal line at 40 percent of the height of the image.

*Compression: minimal compression to ensure maximum quality

https://www.canada.ca/content/dam/i...ormation/applications/guides/pdf/5445eb-e.pdf