A full skirt, huh... so you'd probably want support under it. You know like a... [ She raps her knuckles lightly against her forehead a few times, like she's trying to knock the word loose and then brightens. ] A petticoat!

[ She imitates him, miming the poof of a skirt supported by a petticoat. ]

Honestly, if you're gonna go the whole hog on getting all this stuff, why not just go for a whole outfit? That way she can mix and match the pieces all year however she likes and she'll get a ton of use out of it!