From Grainline Studio:
The Uniform Tunic is designed as a choose your own adventure sewing pattern. While we have provided four options for you, the possibilities are endless as all of the design features are mix and match! Choose your favorite neckline and skirt, decide between sleeves or sleeveless, add pockets — you can’t go wrong!
Techniques involved include sewing a straight seam, darts, setting sleeves, bias facings, inseam pockets, and hemming.
Suggested Fabrics: Light to medium weight woven fabrics such as cotton, linen, voile, chambray, etc. Extra fabric may be needed to match plaids, stripes, or one-way print designs.
Available in sizes 0-18 and in sizes 14-30 D-cup.
While now a stand-alone pattern, originally this was available via Making.