For the little black tunic I started with the Schoolhouse Tunic pattern, woman's size 2/4. I shortened the sleeves and made them narrower, dropped the waist (and made the tunic A-line), eliminated all the pleats, and added on seam pockets (using the Oliver+S Book Report Dress pocket pattern). It was made with black cotton, 1.5 yards with very little left over. Before I redrafted the Schoolhouse Tunic pattern, I sewed myself a muslin to see how much to shorten the sleeves, etc.
For the blue pants I used a basic pants pattern NEWLOOK 6171 girl's size 14 and turned them into sailor pants. The idea and some tips for the pants came from the August/September 2012 issue of SewNEWS magazine tutorial of how to take a simple pants pattern and create a pair of classic sailor pants. The pants are made with dark blue chambray, at least that's what I believe it is, it was sold in the denim section of a large fabric outlet and was unlabeled.
Have a great weekend!
PS Do you know of any good woman's sewing patterns that come in size 2? They are really difficult to come by, let me know in the comments if you do, thanks in advance!