Pattern Description from Knitting Rules!: “What the pi rule means is that if you want to knit a circle, you need to double the number of stitches in a round every time you double the number of rounds you have worked. Practically speaking, this means you double your stitches on rounds 2, 4, 8, 16, 32, 64, and so on….Get it?”

Ingredients: “You’ll need double-pointed needles and circular needles, short ones for short rounds, long ones for long rounds.”

This pattern may be found on pages 175-176 of Knitting Rules!