840 x 25700
840 x 25700 = 21588000
Example of 840 x 25700 pixels banner dimensions.
790 x 25750 800 x 25740 810 x 25730 820 x 25720 830 x 25710
840 x 25650 840 x 25660 840 x 25670 840 x 25680 840 x 25690
840 x 25750 840 x 25740 840 x 25730 840 x 25720 840 x 25710