320 x 12500
320 x 12500 = 4000000
Example of 320 x 12500 pixels banner dimensions.
270 x 12550 280 x 12540 290 x 12530 300 x 12520 310 x 12510
320 x 12450 320 x 12460 320 x 12470 320 x 12480 320 x 12490
320 x 12550 320 x 12540 320 x 12530 320 x 12520 320 x 12510