.:Made from T-shirt scraps:.
My raw material was these small (approx 25x 25 cm) jersey squares. I chose hot pink for this project, since it'll go well with my decor. And who can resist a girly ruffles pillow in hot pink! But two old xxl tshirts in any color should do.
Obviously, it was a bit of a maths problem figuring out how to make use of these small pieces of fabric. I started by sewing 2 squares together (x2 for the other side of the cushion) to obtain the base for my cushion cover (40cm x 25 cm) and got cracking for the fun part, ruffles. Here's a step by step for making ruffles...
1 inch large. It's better to scale up or down depending on the size of your cover, etc. For the length of each strip, the basic rule is that the length of the strip should be twice the length of your ruffle.
(2) Set the tension on your sewing machine to lowest. I used white thread so you can see the stiches, but of course use a matching thread color. Stitch down the middle being careful to leave reasonable amount of thread at one end so you can pull. I find that sewing by machine yields a better looking ruffle, which won't disintegrate. But in any case, it should be fine if you use a needle+thread.
(3) Pull on the bottom thread (4) Spread the ruffles along the length of the strip
(5) Pin the first row, leaving a bit extra fabric over the edges (6) Set the tension back to normal, sew over the middle of the ruffle, closest you can to the stitches holding the ruffle.
(7) Repeat until you have enough rows and then you can assemble your cushion cover. I simply sewed it like a pillow case, without any buttons or zippers.
P.s: I am no expert at sewing (self-taught). However, I'd advise you to practise making a ruffle or two beforehand. As for fraying, I haven't washed yet, but I'm confident it should stay put. Do sew the rows as close as possible though. Oh, this isn't the first or best tutorial on ruffles cushion covers, still hope you like it:) Don't hesitate to ask if you have any question.