Hello Knzon,
Thanks for the question about the Haven landing page image. This is actually the background image and it is 1920×1080 pixels. You can replace the image by going into the Customizer, then clicking on Background then clicking on Change Image. When you’re in the Media library (to select the image), you will see the suggested image dimension in the top left corner.
If you have any further questions or comments, please let us know.
Kindest regards,
Arnel C.