I made this for 3 year old Bella.
The pants are Simplicity 2134 with some changes. I shortened the legs to allow for the ruffle. The ruffle is 1 1/2 times the width of the pants leg.
The top is the Temily pattern. The smocking is from the christmas Handbags plate.it is piped between the front panel and side panels with whip stitch piping.