828 x 21600
828 x 21600 = 17884800
Example of 828 x 21600 pixels banner dimensions.
778 x 21650 788 x 21640 798 x 21630 808 x 21620 818 x 21610
828 x 21550 828 x 21560 828 x 21570 828 x 21580 828 x 21590
828 x 21650 828 x 21640 828 x 21630 828 x 21620 828 x 21610