If you look at http://www.freerepublic.com/focus/bloggers/3119584/posts?page=80#80 you can see the analysis, based on a photo that was taken of her the day the plane went down and the size of the coffin.
How about a picture of her next to another human being or something of known size. How tall/heavy was she? She doesn’t look that big and unless she was very tall, I doubt that she’s too big to fit into a standard casket.