Fast forward to two days ago: when she tried it on, it ripped down the back!! She had grown enough to make it a pure struggle to get into, and the skirt couldn't take it! Because the fabric had been inexpensive, and because I was kind of just done with the whole thing, I threw up my hands and declared it a dress up skirt.
You win some, you lose some. I figure, it was a learning process for me, and a big gain for her! She's a girl who does love a good twirl.