I think that the people who write the clothes sizes on patterns are smoking something. I made these trouser jeans for myself, strictly following the chart on the back, which always seems to be 3 or 4 sizes off what I actually wear in storebought clothes, but oh, well, I trusted they knew what they were talking about, they made the pattern. But alas, now I have a very cute pair of pants that does not fit… Even after adjusting and adjusting. Foo! Hopefully I can find a friend that they will fit.
You need to take your measurement and match them to the measurements on the pattern instructions. In my experience, this means I’m not always sewing something that has the same size associated with it as my store bought clothing. Also, I always pick the the size pattern that will fit whatever is the largest of my measurements…its easier to tailor things smaller later.