I took Butterick 4827 in a ladies 6 and sized it down for a slender tween. Joi's instruction and attentiveness to class instruction was so helpful. It took 2 muslins as I worked the techniques but I am very satisfied with my results. The first muslin had some sleeve issues because I got eager and forged ahead. After watching the rest of the class, the second muslin and final dress were much better. And the princess is very pleased, too.