Select a stencil pattern and how you want to add that design onto your pillow cover--either with fabric paint, fabric spray paint and a stencil OR infusible ink iron on method.
Measure your pillow that you want covered and add 1" to both the length and width to allow for sewing allowances and closure.
Cut out two pieces of drop cloth the size that you measured.
On the front side, add the stencil design in the center of the top side either by using a stencil purchased or cut from Cricut or your vinyl cutter and fabric paint/brush; OR, print out and iron on your design using infusible ink materials.
If you use fabric paint, make certain that the paint is completely dry before continuing.
Take the back side of your pillow cover and cut in half using a straight edge ruler and a cutting blade or scissors.
Turn each center edge in 1/4" and iron down and pin and stitch with presser foot close to the edge from the top side of the fabric.
Measure the stitching edge and cut a piece of sew on velcro the exact length.
Turn both back pieces to the inside and pin the hook closure to the edge (where it doesn't show from the front) of one piece and the loop piece to the inside of the other back piece.
Stitch velcro to the backs.
Close the velcro and pin the front side of the back to the front side of the back of the pillow cover.
Stitch 1/4" all the way around the pillow, stopping and turning the pillow at each corner, to leave a good point when you turn it. Make sure that you stitch over the stitching where you began on the end.TIP: after stitching, I always trim a triangle above each corner to take extra fabric out and when you turn it you will have a sharp point. CAREFUL not to cut through stitching. Open the velcro and turn the pillow cover inside out and push the corners out so that they are nice and sharp.
Insert your pillow into the opening and close the velcro opening.