I'm using the pattern from Fit for Art and have also signed up for the pants fitting class on Pattern Review with Sarah Veblen.
I started with my first muslin and picked wrong. I used a size Medium with a back 1. There are 3 backs per size, 1 is for flat buttucks, 2 is round, and 3 is more rounded. You pick based on hips sizes and what you think/know your backside is shaped like. Considering I always have fabric under the butt I assumed that meant flat, which is does for the most part, but not based on my size.
My hips and abdomen (not waist) both measured 42" at the time I measure.
The first muslin was too, tight, so I went up to the back 2, and I still didn't have enough crotch depth. I drew out the back 3 for the medium and just looking at it knew it would be too big.
That's when I decided to sign up for the online class and watch all the videos. I started to think maybe I needed the back 3 but for the size Small.
I posted my "hello" post on the class board and Sarah popped in immediately and suggested the Small pattern with the back 3.
This afternoon I drew that one out, added extra fabric for my waist area and went to work. Below are my muslin shots (taken with a cell phone and two mirrors.)
I'm happy with the fit and this weekend hope to sew my first pair of pants which will basically be a wearable muslin to see how they fit. Then it's just adjust as needed and keep perfecting the pattern.













