688 x 30000
688 x 30000 = 20640000
Example of 688 x 30000 pixels banner dimensions.
638 x 30050 648 x 30040 658 x 30030 668 x 30020 678 x 30010
688 x 29950 688 x 29960 688 x 29970 688 x 29980 688 x 29990
688 x 30050 688 x 30040 688 x 30030 688 x 30020 688 x 30010