The image file should be smaller than 15 Mb. A Facebook profile picture must be at least 180 pixels wide.

How to Make a Photo Smaller to Set as a Facebook Profile Picture. The quality and composition of your Facebook profile picture gives others insight into who you are as an individual and ...

Facebook Timeline lets you set a cover photo, along with a profile photo. Creating a perfect photo can be a chore, but this iPhone app sets out to make it as easy as possible.