Rainbow hair style is made of four primitive they are together.
If you want to change the hair length to big or small please separate the parts of the hair by holding down one of them and moving it from the group.
You can make a pig tail hair style by duplicating the pony tail hair and ribbon.
They won’t be together when duplicate so please hold down one of primitive then move it to another to make a group.
Also if you want to make a short bob hair style you can duplicate the pony tail and either hide the ribbon or delete it.