The top edge of the pattern should be even with hemline (folded edge) of section A.
Open the pocket pattern and pin it in place. Measure the distance between the paper pattern and the outer edge of section A at the top and bottom of the pattern.
Trace around the pattern with tailor’s chalk or your tailor’s pencil. Keep the chalk line very sharp, because you will be using it as a guide for stitching the pocket.
Get the pocket ready to stitch
To make the pocket, you will be stitching section A and section B together. Since two thicknesses of fabric are more bulky than a single thickness, it will be necessary to learn how to pin them together so they will not slip when you are stitching them.
Place section A over section B with cut edges of lower corners and side edges matching. The hem should be folded to the inside and chalk markings to the outside.
Pin the two pieces together with the points of the pins directed to the side edges of the case.