"Pin-up" shades are the best way I can think to describe these, although they're really hook-and-eye shades.
We live in a little house, and most of the interior real estate is occupied by furniture, projects, or a dog who is everywhere at all times, so drapes just don't work for us. I've made these simple shades for years, since they neither add nor subtract anything from a room; they fit right inside the window frame - neutral, minimal, low-key.
But lately my tastes have veered towards those of a well-appointed pensioner, and ... now I'm on toile.
The other day I saw a gorgeous, faded-aqua toile online that I searched and searched for, only to find that it's exclusive to Pottery Barn, of all places. Instead of country maidens and men a-courting it's got big, broad leaves and little old mills - not that, if I'm being honest, I don't love the former. I found a gently-used king-sized duvet cover on eBay that offers about ten yards of fabric, and seam-ripped it into its basic components.
These shades are super-easy. Just measure the inside of your window frame. Add 1" seam allowances to each of the sides and the top, and 3 inches to the bottom, for a nice, wide hem. Fold 1/2" creases onto the sides, then fold over and press again. Straight-stitch the hems.
Once the sides are hemmed, repeat with the top and bottom, making a 1/2" hem at the top and a 1-1/2" hem at the bottom.
Sew the eye portion of a hook-and-eye closure at the top corner of the panel if you'd like it to open to halfway, or at two-thirds the panel's height if you'd only like it to open a third, like mine. Sew the hook portion at the corner of the bottom hem, at the front with the hook facing out. Repeat at the other side.
Buy a 1/4" wood dowel and a 1/8" wood dowel (under a dollar at the hardware store), and use a knife to score the 1/4" dowel at the right length, about 1/2" shorter than the width of your finished panel. Measure in several inches from each end, and use a very small screw to screw two shallow holes into the dowel, where marked. Slide the 1/4" dowel into the hem at the top of your panel, turning it so the holes are positioned at the top. Snip a tiny hole into the fabric above the hole, and screw in a small eye-hook. If you plan on making more than one shade, make sure to use the same dimensions on each one. Not doing so will create a huge hassle if you ever want to switch curtains around in your house.
Screw in two hooks inside your window frame to correspond with the hooks on your panel, and hang the panel. Slide the 1/8" dowel into the bottom hem so the panel hangs neatly, up or down.
Post-Script and Apology:
How do people photograph shades? Shelter mags always have perfectly light-balanced spreads where you can see the pattern in the sofa, the details in the rug, the stripes on the curtains, and the hedges outside. How? Windows, taken from the inside, are backlit by nature. Since I don't work for Veranda, please excuse the ambiguous quality of these pictures.