Although I do think the item in question is some type of holiday doll, I think I would have to agree with a previous poster on the size of the doll being larger than a standard barbie. It really does look larger than a barbie relative to the size of the window screens above it in the photo, and the other items around it. A regular size barbie is going to look significantly smaller, and we already have low resolution, but can still tell that it is a doll pretty much.
There is also something else draped across the bottom half of the doll - maybe another doll, not sure. Looks like the doll is wearing red and white with blonde hair, on a box shape with white paper/cloth under it. Across the bottom half of it, perpendicular is shiny gold....maybe the shiny item is above the doll, or bunched up, or something - looks like it casts a shadow on it anyway. but it's covering up the second half of the doll, or it could be a large bottom of the dress - ruffled and pouffy, casting shadows down and all hazed together due to the low resolution - which if it is, makes the doll even larger. And that doll looks splayed out on the cement floor on a blanket. Why so? I know some have said they thought that maybe it was a gift ready to go, and needed to be opened to look for the size 12 underwear, but it seems unlikely they would wrap the underwear in the same package as the beautiful doll, but who knows? I mean, either way, it should look strange that the doll is open and out like that on the floor as well, but no comment was made about that, like was made about the barbie nightgown not supposed to be there...
...And speaking of items that are 'not supposed to be there' - why are any open dolls supposed to be in that cellar room either? Patsy said, 'That's a barbie doll under there', in one of her statements discussed in this thread as well, when being shown photos of items taken from/in the cellar. And if she admitted to wrapped gifts being in the cellar, then what did she think of unwrapped dolls and/or gifts being in the cellar? Why not ask, "Why are those dolls in there with her as well? Why are those gifts unwrapped and thrown everywhere?" I guess she could think it might be normal if the intruder saw wrapped gifts and thought he might find something valuable to take or whatever... but you would think she would make some comment about them, since she said the nightgown shoudn't be there, and especially if she knows/doesn't think this intruder is looking for underwear in the gifts, becuase she said JonBenet put them on herself probably since the underwear would've been up in JonBenet's drawer for her to pick out....
...Thinking there was probably more than one doll in the cellar - Patsy identifies at least one barbie doll. However, that doll in the red looks larger than a barbie, and I have read previous posts and info discussing more than one doll in the cellar as well....