Please take a look of my portfolio in the Below dropbox link of respective clients and works are provided for your evaluation.
https://www.dropbox.com/sh/8dj4bpcizgapj9r/AAAJjjdYu14gxvXq9WxYJS0ca?dl=0
I can design Facebook Cover image, profile Pic ,Facebook page
my design cover you can use on any social site it will fit .
Thanks