I used one skein of Patons Lace in Porcelain with size 6 needles. I used circulars to accommodate the large number of stitches.
Row 1 and 4: k across
Row 2: k1, p to last st, k1
Row 3: k1, (yo, k1) 3 times, (k2tog) 6 times, *(yo, k1) 6 times, (k2tog) 6 times; rep from * to end to last 4 sts, (yo, k1) 3times, k1
Rep rows 1-4 until you have reached your desired width.
BO loosely, or using JSSBO. Fasten off and weave in all remaining ends.
I blocked this lightly, just by wetting it and pinning it out, making sure to pin the ripples.