Could some one please tell me how many stitches to cast on for a poncho to fit a 4 year old? I have been trying to make my daughter one and don't know how many to start with. I have tried 50, 65, and last night I tried 128. And should I still knit until it's 16 in long? I have no idea how many to start with. She really wants me to make her one. Any help would be greately appreciated, I am very new to knitting.