I won't post a picture, but she insisted that the skirt's elastic waist sat below her bum. So she was running around in it with her little pink britches poking out the middle. So, grandma wondered if it was because the skirt wasn't floor length that she was attempting a fashion no-no.
So, during her nap, I stole her costume and rifled through my old clothes stash and decided upon this t-shirt material shirt.
Then I laid the skirt on top and eyeballed how long it needed to be on my girl to make it floor length, if she were to leave the elastic on her waist. Then cut straight across.
Then I lined up the side seams and then pinned in haphazard pleats. Then sewed across.
That seems to have been the problem. Now she has a "real princess" length skirt that she willingly wears above her rear.