(Photos from this step copyright of Michael Maloney.)
Step 1: Measurements
-Nape of neck to middle of hips (or whatever length you want the shirt to be). We'll call this "Length Measurement". [pictured]
-Bone of shoulder to wristbone. We'll call this "Sleeve Measurement". [pictured]
Step 2: Materials
Length Measurement + Sleeve Measurement + 5* Seam Allowance + 1"
Choosing fabric width: Pick the biggest of your bust, width, and hips measurements. Add 2* Seam Allowance. Make sure your fabric width (not including selvage) is bigger than that.
Buttons (2) for wrist cuffs