Actually it's implied that she's kinda tall compared to a typical female adult in gensokyo (I think Yuugi and Komachi would be as tall if not taller)
It's a stuffed bear. I saw it in that store in the forest, and it was just too cute to pass up.play a while with her, won't you?Okay!Just a sec, I'm gonna go get that thing I got from Meiling!Flan,What'd you give her?