I am soon going to order a lovely Monique Ginger wig in Carrot Red for my beautiful doll, but don't know the size to get... My doll has a 7.2 inch head. Normally, I would buy her a 7-8 wig, and it would slip all over but I would put a rubber band on or use a similar technique to keep it on. But I've heard Monique wigs are particularly stretchy... ...could I risk a 6-7 size wig? Or should I stick with 7-8? Thank you!