I found the Id of the small doll. The larger two are Glitter Girls, the blond is named Amber, but the small one has been redressed but was the horse riding Suky doll. That means Suky dolls are smaller then Glitter Girls. I found the ID on a website for Dawn ID, here is the link for the page Lesney Dawn Clones
However the small doll has been redressed, but I emailed the seller and she said the small doll is the horse rider, and I found the photo of the horse rider, and the faces seems to match up.