But when you have quite a flat backside, or when you have a large high hip or abdomenal circumference (meaning a large waist and stomach area) going to a flat backside or pencil thin legs, this center leg seam is truly a life-saver. With this seam, you can deepen the stitching curve under your backside and you can use it to help taper the legs. Those of you who have seen this process and the results being pants that fit so well, are true converts.
But have you thought of using this same seaming concept up the front of your pants leg? In this photo, you'll see pants front - with one 'regular' leg and one 'seamed' leg.
Here's the completed side and back views.
Now, to make this happen, I suggest watching this video. This concept of adding seams to the interior of both the front and back legs of your pants pattern is significant enough to have made a video on the process. Please take a few minutes to watch.
Just give this a try to see how simple and effective the pants princess seam can be to help refine your pants fit.