I'm looking at the Minnie bi-stretch wool pants but I'm totally confused by sizing. I'm a 10-12 pear but wear a 2 in their No 2 Pencil Skirt, torn between a 2 or a 4 in the Minnies? Size chart suggests a 6 in bottoms but I'm a 2 in the skirt so I don't trust that. Also if I were to order both sizes to try, how quickly do they process returns?