Maybe cut up a felted jumper to make this, or if you have the patience, pick up the stitches (unfelted) and cast off . could even crochet into the cut edge (Knitting Relay). Add a pretty shirt to complete the look!
DIY Ribbon Tie Sweatshirt Refashion Tutorial from Wobisobi.Except for sewing a teeny bit where you attach the ribbon, this is a no sew DIY. For a huge archive of excellent DIY sweatshirt restyles go h (Diy Clothes)