On each piece of the skirt, pin one pocket piece to a side seam at the waist. Pin the pocket to the right side of the fabric. Sew the pocket to the skirt piece. Your goal, ultimately, is to get the to pockets to line up in the same side seam when you sew the skirt together.
What? No, I got that right. Sew the wrong sides together. You’re about to make a french seam. It’s, like, 2 extra steps, and it’s soooooo much nicer! It’s also much stronger and washes better and will impress the heck out of your mother.
Trim the seam down so there’s only 1/8 ” past the stitching. You don’t need to measure – just sort of whack half way between the stitches and the edge.
For those of us working at doll size, the first line of stitch is at 1/8″, and we’re trimming to rrrreeeeeeeaaaaaalllllyyyyyy tiny. We’re using a hairline seam.
Turn the skirt so it’s right side to right side. If you’re in the mood to do everything right, you could take a minute to press the seams so there’s a neat crease along the stitch line. That will make the next bit faster and easier. (I won’t think less of you if you don’t. First off, I won’t know. But I also skip this step a lot myself.)
It’s really important that you not sew the pocket all the way to the top. That extra bit of opening is what will allow you to get into the skirt.
That almost is incredibly important! Do not cut past, or even to, the seam allowance. At the end, pin the other side of the pocket folded back, so it lies over the skirt (not between the skirt and waistband!)