I'm going to a fancy dress do on sat, the theme is onesies or big kids (cos it's too bloody hot to be in a onesie!) my original plan was Alice in wonderland, but the outfit has a ridiculously small waist and won't do up

I could send it back and get a new one, but it's cutting it really fine!
So I just went to m&s and got a school summer dress

got an age 12 and it's far too booby, if I zip it up more it squishes my boobs. If I was to get an age 13 it'd be past knee length probs and I don't think they had any zip up one's that size anyway!
So I'm stuck! Does anyone have any ideas? I'm gutted about Alice in wonderland, but I don't think itd arrive in time! What sort of dress has a 23-25" waist and 36" hips?!