burlap coffee sack
twill tape (I used natural color, 1 inch wide)
1/2 yard plain fabric (you'll have plenty left over)
glue gun and glue sticks
Step 1: Cut Your Coffee Sack to Size
Then, away from any decoration you'd like to feature, cut up the tube to form a long rectangle.
Measure the circumference of the base of your current lampshade and cut the long rectangle to that width plus 1 inch.
Now this tube should be the same height and circumference of your current lampshade. (larger on top if your lampshade is tapered, but that's fine)
When you have one long strip, gather one edge by setting your thread tension as high as it will go and your stitch length as long as it will go. It will gather automatically.
Thread another length of twill tape through, leaving enough hanging to form a bow.
Slide the new lampshade over your old one, and cinch the twill tape to fit.