684 x 30000
684 x 30000 = 20520000
Example of 684 x 30000 pixels banner dimensions.
634 x 30050 644 x 30040 654 x 30030 664 x 30020 674 x 30010
684 x 29950 684 x 29960 684 x 29970 684 x 29980 684 x 29990
684 x 30050 684 x 30040 684 x 30030 684 x 30020 684 x 30010