I used two skeins of Loops and Threads Payette in Periwinkle Twinkle. I used size 7 circular needles to accommodate the large number of stitches.
Co 3, longtail
Row 1: (k1,yo) twice, k1
Row 2 and all even rows: purl across
Row 3: (k1,yo) twice, pm, (k1,yo) twice, k1
Row 5: k1, yo, (k2tog, yo) to last st before marker, k1, yo, sm, k1, yo, k1, (yo, k2tog) to last st, yo, k1
Row 7: k1, yo, k to marker, yo, sm, k1, yo, k to last st, yo, k1
Repeat rows 4-7 until desired size.
Bo after a row 6 using Jenny's Surprisingly Stretchy Bind Off, or your favorite method of binding off loosely.
Fasten off, and weave in all remaing ends.
I just love this lacy stitch for this shawl!