SCP-XXXX were received by several people in North America. They all don't recall buying any china dolls, not did any relative send the entities.
That should be "nor".
Instead of saying "varying in size" maybe do a range. like 30 to 20 centimeters in height. perhaps put a bit more into your description, like the fact they all have a "style" of clothing. I would personally like it if you described a doll or two as being in foundation possession and then breaking because of some kind of accident, or maybe it…wasn't an accident. But one major thing is lowering the amount of dolls, limit it to like 12 or a smaller number, that way you can go into detail about them and actually describe them.
Plus I think it would be cool if each doll had clothing, skin, accents, and behavior that corresponded to a certain time or place on earth.
otherwise pretty good.