I made pillows for my now stained, erected, boxspringed, and mattressed bed. Again, Ikea is fabulous. Cheap cushions for covering.
$1.49 and $2.99, 14"x14" and 20"x20", respectively.
Easily turn those into these.
I recommend that finished pillow covers are one-half to one full inch smaller than the measurement of the pillow for a more snug, less baggy look. Also, don't bother with zippers. Just make the back panel about two inches wider, cut in half, fold and hem at the meeting points, and sew front and back panels together at all four sides to make an easily removable cover.
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