My oldest requested a doctor's coat. Instead of spending the money to buy some, I thought I'd work through my fabric stash and make both of my girls one. However, googling yielded few results, most involved refashioning a men's dress shirt, or using a pattern. I knew I'd have to create my own pattern, which I did from a shirt that fit each of them. I also used a set of curtains that I picked up on clearance, intending to make them summer dresses out of the material, but that never happened. Since I used curtains, I had the hemming finished. However, if you are using off the bolt fabric, you will need to add in hems.
First, lay out the sleeve like so. I'm using a pajama top here. I added 2" to the depth of the sleeve, to allow for seam allowance and arm room with clothing underneath. This is marked with the yellow pin. Second, if you are hemming, you'll need to add 2" to the length. Double fold 1" and hem. Trace your sleeve, include the curve where the sleeve meets the shirt. Cut 2.
I did not picture the pocket cutting, as this is optional. I just cut two rough squares, larger than I would need. Later, I squared them up and added them.
You will want to pin the two front pieces to the back piece at the shoulders, with right sides together. Match up the neckline and the arm holes. Sew across each.
Repeat on the other side.
Do any other hemming, if necessary.