Happy Pi day!  (In America, anyway March 14th (3/14) is Pi day.)  Let’s celebrate by eating pie and talking about Elizabeth Zimmerman’s super nifty pattern, the Pi Shawl.

This pattern (or un-pattern, since, like most of EZ’s patterns this one is more of a guideline or than written out instructions) is available in several of her books, but it was originally published in the Knitter’s Almanac.  Hey look!  There’s the Pi shawl right on the cover.

The Pi shawl is a circular shawl knit in the round from the center out (so it’s great if you hate casting on.  Less great if you hate binding off).   It’s based on the relationship between circumference and diameter, so that every time you double your rows, you double the number of stitches by working a row of (knit 1, yo) increases.  So, all the shaping happens in only a handful of rows, which means that the rest of the shawl can be used for adding whatever lace, stripes, or whatever else you want.  It’s a great way to play around with new stitch patterns, or to try out a lace stitch that’s been bouncing around in your head.

You can go lacy and delicate with thin lace yarn and openwork designs.

You can do stripes and simple eyelets.You could even make a cozy round blanket with thick wooly yarn.

Happy Pi Day!