You don't have to spend a fortune on your arch window shade. An economical shade (made from real fabric) that you have been waiting for.
Arched windows curtains on the hooks, Arched windows treatmentes - Curtain designs
Covering a large bedroom window (drapes, paint, ceiling, curtains) - Home Interior Design and Decorating - City-Data Forum
These staggered sheers are a great way to draw attention to the architectural interest of the windows.
Arched Kitchen Window In Black (ignore draperies)
pictures of window treatments for rounded windows | Arched top windows traditional window treatments
arched window treatment hardware - not sure how the rings are staying in place....I would assume there is a pin/nub holding each ring in place
arched windows curtains on hooks, arched windows treatments
Floor to ceiling curtains draw the eye up giving the illusion of height #StyleTips photo by Prue Ruscoe for Vogue Living
Curtains for Arch Windows | Drapery Connection