FB

  • cover photo 820 pixels wide and 312 pixels tall for desktop, 
  • 640 pixels wide by 360 pixels tall for mobile
  • post: 1200x630
  • profile ph. 360 x 360

IN

  • 1080px by 1080px (Square)
  • 1080px by 1350px (Portrait)
  • 1080px by 608px (Landscape)