Pi, even though most of us know it equals approximately 3.14, can be a complicated math concept (it’s defined as the ratio of a circle’s circumference to its diameter). In knitting, we refer to circular shawl shapes as Pi Shawls – or half circle designs as Half Pi Shawls. Typically these Pi Shawls have intricate lace patterns that, while stunning, can be just as mind-bending as the concept of Pi. This year on Pi Day, which falls on March 14th, we’re celebrating with a round-up of Half Pi Shawls with a simple construction because right now we’re craving projects with familiar stitches and repeats.

Gold Shawl by EweKnit Toronto

This Half Pi shawl features rows of repetitive lace work and a whole lot of solid texture. Work this shawl from the top down with 730 yards of DK weight yarn.

Floating Shawl by Helen Stewart

Originally part of Curious Handmade’s Shawl Society 4, this Half Pi shawl pairs relaxing garter stitch with a simple lace panel along the border edge. Use 950 yards of fingering weight yarn and work this shawl from the top down.

Spring Peeper Half Pi Shawl by Beatrice Perron Dahlen

Long, but lightweight, this shawl uses lace or fingering weight yarn to create this textured shawl. Combine sections of garter stitch and a star cluster pattern as you work this shawl from the top down.

Cloud Half Pi Shawl by Beatrice Perron Dahlen

Garter stitch and eyelets combine to create a simply stunning design in Cloud Half Pi Shawl. Use 660 yards of worsted weight yarn to work this half circle design from the top down.