I did this tonight to see how well I could finish all of the seams and facings, as if it was going to go into a shop. I still have to do the buttonholes. It fits Esme well as a standard size 4. Last time I altered the length two to three inches longer for her. She is long in the torso, like her mother. I didn't do that this time, and probably should have for wearing with pants. For wearing under her jumper or over another dress, it is going to work fine.
materials: 1/2 yard of main color fabric for this particular. 3/4 yard of 45 inch wide fabric would be ideal for the lengthened version, and a fat quarter or a 1/3 yard for short sleeves. Four buttonholes have been worked (not shown).