It all depends on how big you want it to be. I make my couch size quilts so that you can snuggle up with them while you are watching tv. I start out with a 7 inch square and sew 1/2 inch seam. So you end up with a 6 inch square. I usually use two colors and I buy 3 yards of each color and 3 yards of flannel. But you can use as many colors as you like and you can make it as big or as small as you like.