I made some baby bolster pillow covers few days ago. I am really slow in sewing. It took me one whole afternoon making these five pieces (pss.. I enjoy hiding in my sewing and craft corner for a long time anyway).
The white cotton fabric was cut out from old Ikea baby bedsheets. This fabric is still in good condition and good quality. I top stitch a piece of fabric with different prints on each white bolster cover, and that's it.