Fabrics for upholstering furniture, cotton fabrics, flax, fleece, jeans, felt are very well suited for sewing a pillow cover. There are no particular limitations. For this cover I used linen fabric. You can take an old pillow and sew a new case under it. Or do everything completely independently. I used an old padding cushion for stuffing, from which three decorative pieces of 40x40 cm came out at once. It is better to soak natural fabric before sewing in hot water and iron it with steam iron to avoid shrinkage after washing. So, the example describes the sewing of a cover measuring 40x40 cm. Cut a piece of green fabric measuring 43x50 cm (the size of the pillow plus the allowances for the seam and the fabric for the folds). Then, for the back side with a fastener, cut out two more pieces of white fabric 43x26.5 cm (the side of the cover divided in half plus 5 cm on the fastener). You can do without a fastener and just sew up the non-stitched part with your hands gently after putting on the cover, but it will be more convenient with the fastener to then wash the cover, especially if the fabric is light and you have to wash more often.We take a piece of linen lace, slightly longer than the side of the cover.We process the back part of the cover. The allowance for the fastener is ironed 2 cm, then 2 cm again. It's good to press the ironed part down for a few seconds with a wooden ruler after ironing. Wood absorbs moisture well, acting as an ideal press.Pulling back 1 mm from the pressed edge.We mark with pins on the completed strap of the fastener where the buttons are attached - sew one in the middle and a couple more, departing 7 cm from the middle button.Sew on buttons, making sure that the threads are not visible on the front part of the fastener, for this we sew, touching only the top layer of fabric with a needle.We fasten the buttons of our fastener and on the front part of the fabric with the letter" G "we sew the two parts of the back partabout 5 cm. On the short part of our seam we tack so that the seam does not spread when we put the cover on the pillow.Take a green piece of fabric and make markings on it for sewing lace and folds. This is done so that the decor elements look symmetrical. On the longer side of the fabric, we set aside from the cut to the right 21.5 cm (the length of the side of the cover divided in half plus the allowance). This is our middle of the pillow. To the left of the received line of the middle we lay 3 cm (half the width of the lace). To the right of the line of the middle we lay 4.5 cm (half the width of the lace plus the width of the fold - 1.5 cm).We put lace on the left line and sew it with a straight stitch on both sides. Two lines are always laid in one direction! Otherwise, the fabric under the lace will be pulled during sewing.We begin to lay folds. We iron the fabric, folding it in half along the drawn rightmost line. So folds turn out ideally equal.We remove the fold, retreating from the ironed edge of 1.5 cm (width of the fold). We press the fold from the inside out in the direction from the lace. We fold the fabric again with the expectation that the new fold will also be 1.5 cm wide, ironed.We remove the fold again, but this time we retreat from the ironed edge 1.7 cm - so that the line cannot be seen from under the folds. In principle, such folds can be made as much as you want, just do not forget to first calculate the consumption of fabric. I had a little fabric, so I laid a decorative line along the folds in two rows. You can sew a narrow lace. Or make a pillow symmetrical just by sewing the lace in two rows. It all depends on the imagination and, if you do not want to spend extra money on the purchase of decor, on what is in the home stock.We fold our two parts of the cover face to face, peel off with pins, align the cuts and stratch around the perimeter.We treat the edge with an overlock or a zigzag stitch.This is how we got a decorative pillow on the sofa. And indispensable as a decor and comfortable for relaxing.