How does the sheet size come? if it is qty of 2. 50" W x 24"H? What about gradient looks?

With gradient materials, the 50" measurement listed is the full height of the gradient (this would correlate to the height of the window.) The length you enter/select will be the width of your glass. When you install a 50" high gradient on 24" high glass, you will need to position the gradient to your desired position and trim the material to the height of the glass. In this case, if the width of your glass is 50" and you have two windows, you will need at least 9 feet in length.