I just learned to make the pillowcases in Jenny's tutorial for the CEGB here on M*. I have a baby gift to make and would love to include a baby pillowcase. If a regular pillowcase is 27 inches for the body and 9 for the cuff, what would the cuts be for a baby size? Or a king size pillow?

This may be somewhere on the forum, but I can't seem to locate it and the math is escaping me for some reason. Thanks for any info on these cuts.