Confused to choose the right size for photos on Facebook.

[Julia Ann]

I'm a Facebook user for a long time & using Facebook. My experience with Facebook has been always amazing but now I'm days I'm facing issue to post my images.

I do see an image error as image size & I don't understand, How can I fix this issue.

Please suggest the way to fix the image size issue.

 

[Graybeard]

Does this help? Looks rather complete ... Facebook Photos Size Guide | UPDATED 2019

I do see an image error as image size & I don't understand, How can I fix this issue.

Is it possible that you are using images from a URL and there is some hosting issue with Facebook accessing the image and copying it to the Facebook platform?
404 means that the path is bad (usually). read that server's error.log to find out why