It took me a while to work out the alterations I needed to do to incorporate the pleat, and I did about 20 squillion more things than I needed to do to make the band across the front, but I like the way it turned out.
It's dress length at the moment, but I really don't think it will be warm enough for winter, even with tights underneath. So once it starts getting properly cold I'll shorten it to a tunic top length.
I also had a bit of an epiphany moment - just before I added the ruffly straps, I looked at the dress and thought, 'I've completely unintentionally made a really cool skirt for a small child!'. So I'm thinking I'll keep it when munchkin grows out of it, whip off the straps, and use it as a skirt.
I have no idea about sizes for bigger kids though - does anyone know what age child has a 20" waist?
Next week - button holes and pockets, woohoo!