Personal profile and background photo
LinkedIn profiles are very different in comparison with Facebook, Instagram or Twitter. LinkedIn calls for a personal profile that looks as professional as possible. The LinkedIn profile picture is 400 pixels x 400 pixels and it can go up to a maximum of 8MB. Also, the recommended size for your LinkedIn background image is 1584 pixels x 396 pixels.
Logo and cover image
If your company is not on LinkedIn yet, then you need to create a page right away. However, keep in mind that LinkedIn is a very different social platform, thus, all visual sizes differ from the rest. Upload your logo as a 300 pixels x 300 pixels profile picture and a 1536 pixels x 768 pixels cover.