I made size 8 but it turned out too wide at the waist. I tried to get away with belt loops and wearing a belt - but it puckered and with the rather heavy fabric didn't look good.
Last November I came back to it again with fresh ideas: I unpicked the waistband, belt loops, zipper and back seam. I did cut away about 2 cm at each back seam line, then inserted an invisible zipper - the look of it I like much better than the original lapped zipper. I did cut out a new waistband length according to size 6 and attached it. I didn't make a folded waistband but used the same cotton lining fabric on the inside of the waistband as I used for the pockets.
Now it fits perfect! Since it's finished I did wear it quite often this winter with leggings, at the weekends when we go for walks. The big pockets are useful at this occasions - although I might would make them smaller for "office outfits". I'm of a small body size and I have to dig quite deep into the pockets when "fishing" for small stuff... :-)
Madeleine Skirt
Victory Patterns
Fabric: 80% wool 20% polyester
Used: ca. 200cm length x 140cm width
Size 6