Day 21- Too tall for small

So my daughter has just turned 11 but is incredibly tall....she really wanted to be a Frankie stein character doll for Halloween but unfortunately they don't have any to fit so mummy is about to attempt making one with my girls own design twist....just to make the useless seamstress life more difficult :) x
So the fun begins....last year I had to make a scorpion for my son....what happened to the bin bag witches?,??