878 x 21280
878 x 21280 = 18683840
Example of 878 x 21280 pixels banner dimensions.
828 x 21330 838 x 21320 848 x 21310 858 x 21300 868 x 21290
878 x 21230 878 x 21240 878 x 21250 878 x 21260 878 x 21270
878 x 21330 878 x 21320 878 x 21310 878 x 21300 878 x 21290