Not only a solution for needing window treatments in a crazy custom size, but also a way to make use of the ugly-as-sin metal miniblinds that I took down! Create Gorgeous Custom Roman Blinds (Without Sewing!
DIY Roman blind tutorial in 20 pictures or less. A great tutorial regarding how to make Roman Blinds. Also see her link for how to do these blinds with an outside mount (instead of the inside mount in this tutorial).
Roman shades are a stylish option for windows but often come with a custom price tag. Dress up the windows in your home with easy, affordable DIY Roman shades made from basic miniblinds. see better homes & gardens also has step by step video
How to Make DIY Roman Shades for Wide Windows Using Mini Blinds - with this method you do not remove the slats. Interesting idea for our small kitchen window.
Windows ~ DIY Shades and Panels
diy roman shades - use drop cloth and purchase a table cloth, panels or bed sheet with your favorite pattern and add to the drop cloth....very inexpensive and all of your windows can be covered throught you home.
Making a Classic Roman Shade - Martha Stewart DIY Decorating. My cats love shoving their little faces between the mini blinds (thus bending and breaking the blinds), so these (made of strong fabric) might be a solution.