I made these Pietra pants recently, and graded from size 16 waist to 18 at the hip using the tips in the designer's instructions. It strongly urged not to grade the legs down very much below the hip. I regretted that!
I wound up picking apart and resewing the legs from the hip down several times because they were too baggy and the crotch was too low. They're still too baggy IMO, but not terrible. Did I make a toile? Yes, out of the cheapest bedsheet you can imagine. Perhaps it was too thin and yet also somehow cheap and crispy to convey that the legs were too baggy. Live and learn...how to unpick seams with minimized rage.
I also had to unpick the waist a few inches to shorten the elastic after using the suggested elastic length, which also makes me feel better about going down to a 14 over all, if I make the wide leg view which should have more room in the hips by design.
They DO feel like secret pjs that are office appropriate, so def keeping them in rotation for the upcoming unbearably humid & hot summer months when the walk to work in the morning is already ~nasty~ (tilde nasty is a low of 85f with 90% humidity).
I think I could make the wide leg view 2 sizes down from where I started with these. So, a straight size 14 🤞. If I make the effort, I shall report back on the results.