[Carl n Susan]

They do make various widths. I have two different width ones as my two windows are different in size. I could have got one big one to cover both windows but choose to go with two.
As for drop, the standard shade ends at the bottom of the window. Even a setting (or rising) sun can not get by the shade screen.

I am moving tomorrow and once setup I will extend the shades and take some pictures for you.