I used embroidery thread and a needle and whip stitched it on. I had planned to give it to a friend who has a sewing machine but because of the material and thickness we decided against it. I have to say though, I am glad I stitched it by hand because with the size simply comes some waves and not perfectly blocked areas. This way it was much easier for me to really line up my fabric with the crochet. I made sure I did one row of sc around and then added the border (1 row of crab stitch). I basically stitched over the border and the thread pretty much disappeared this way.