Images are extremely popular on Facebook because they have shown increasing engagement from users and with knowing the recommended upload size, dimensions, and image aspect ratio for your images they can truly deliver a visual representation of your brand.
This infographic works as a quick reference guide through the Facebook timeline and explains the optimum sizes for every section including the cover photo, shared links, shared images, highlighted images, and milestone images. In addition to the regular images in a timeline, it thoroughly explains post and ad dimensions across desktop and mobile, including videos.