Bolster Pillow Cases

I tried to put it in a pillowcase and put a ribbon on the end, but it seems sloppy.

Measure the pillow-length, width and diameter. Cut 2 circles the circumference of the miter, and another piece of equipment of the circumference. Add to each seam, and sew them together. Or, cut a long piece of material, rolling strengthen him and tie with ribbon. If you do not have the basic geometry, you do not understand a thing.