Last week I alluded to my failed attempt at a faux roman blind. The reason for my failure was due to the fabric selection. I learned a big lesson...fabric weight matters. I chose a lightweight fabric that just couldn't hold the folds of the roman blind. It kept drooping so in the end my roman blind was out and 2 new pillows grace my sofa while I await the arrival of a new fabric for the blind.
Measure your pillow form from seam to seam.
For the front, use the pillow measurements and add 1 inch to each side for a seam allowance. My fabric was easy to work with because it's geometric but if necessary, use a square to make sure all your lines are straight.
The back is a flap that requires 2 separate pieces, one slightly longer than the other. Based on the size of your form, calculate so that there is enough to overlap and add 1 inch to each side for a seam. Here are my measurements for a 17" form. The front measured 19 x 19 and the back pieces were 19 x 11 and 19 x 12.
The overlapping pieces on the back will require a hem. Fold 1/2", iron and fold another 1/2" and sew.
Lay the right sides together with the back pieces stacked. Pin together.
Sew pieces together and then trim close to the seam. Clearly there are no extra points for neatness.