Piecework had an article about the sewn and embroidered pincushions recently. https://en.wikipedia.org/wiki/Biscornu The 2 sides are rotated by 45 degrees so there are 8 points. Here is my knit version: With a provisional cast on, CO even number of stitches * 4. Work 1 side, then work the other, but offset stitches so the decrease is centered opposite the twisted stitch of the chart. (my blocking was wonky!)
Shown with a cast-on count of 44 stitches.