This edging is made in three rounds :: two rounds of chain loops, followed by a final round of shell/scallops, and is very easily worked around any size of granny square. Crochet Granny, Crochet Blankets Edging, Edging Tutorials, Crochet Edging, Crochet Border For Blankets, Granny Blankets, Granny Squares, Crochet Sewing Knits, Crochet Knits
Also on these boards
stunning edge on crochet blanket - Links to Etsy. No pattern, but looks like a double crochet shell stitch with a picot in between each dc? Looks easy to reverse engineer.