I bought 8 yds. of Outdoor Fabric from the clearance section at Hancock Fabrics. (it was 56" wide)
It was $6 yd. and I had a 10% off coupon making my purchase around $44.00
My cushions were standard sized at 42" x 22"
I cut the fabric at 47" leaving me a rectangle 56" x 47". (You may need to trim off the sides or take it in depending on your cushion size.) Next, I folded it over and sewed the top and side seams, right sides together with my surger, but you could use a conventional machine. Basically this left me with an inside out pillowcase. Flip it right side out and put in the cushion.
Then, I used my surger and closed off the bottom of the cushion. If you have a regular sewing machine you may want to slip stitch it closed. That is it!
You could sew it more fitted if you want or add the seperation lines in the middle of the top cushion, but I was pleased with them and was happy to be done in just a few minutes per pillow. I made 6 in less than 1 hour!
The babies were happy too!!!