This isn't Dorothy exactly, but it's in the same late-30's mode, which I love. The All-N-Wonder Dress (in the MP here) is the only one I know of that shapes into the right type of jumper. It doesn't fit my Misaki very well, but it will fit the Vicky-type figs. These shoes are the BR-shoe by Xena. You could add Geralday's pigtails, and you'd just about have a Dorothy.

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