Open a new file with 550x150 px and 72 dpi. The next instrument can be helpful in representing the background of the banner to be with the indicated parameters below.
Blending Options-Gradient Overlay
Gradient’s parameters:
The same instrument will be helpful in creating the lowest layer of the button to be, colored in 191B1A with the sizes indicated next step.
Blending Options-Stroke
Using this instrument , create the second layer of the button with the indicated parameters next picture.
can be helpful in representing the background of the banner to be with the indicated parameters below. 
