I have made tons of the bibs in finger tip towels sizes. I had a day care for a while and now my daughter has a day care. She uses these all the time. The towel needs to be long enough in front to stay tucked behind the high chair tray. Too short, and they are dangling in the food. Cut the hole so that it fits over YOUR head. You'd be surprised how big a baby's head is. Then stretch the ribbing so that it fits VERY TIGHTLY around YOUR head. After I sew on the ribbing, I surge the seam. The nice thing about these bibs is that the baby can't pull them off. If they are used from the time they are really tiny, they are used to them and don't try to pull them off.