Let’s see how to draft the pattern of this asymmetric shirt.
Any shirt fabric will work, but you’ll get the best out of this pattern if using a striped fabric that highlights the different grainlines.
Start from a basic block.
Draw the back yoke and the slash lines as you see in red.
Draw the front button stand and slash lines.
Cut both pieces through the lines and open them with the new volume.
The drape you see on front is actually given from the extra length.
Your pattern is ready: