Sisley ladies gray suit size 42

Beautifully tailored gray pinstripe jacket and skirt by Sisley size 42. Original tag is on skirt and skirt alone was $79. Skirt features and ultra feminine lace trim. Suit has never been worn. Size reads 42 which would translate to a US large, however, when I bought this I was a size 6.Skirt measurements lying flat is 16 inches across the waist and 20.5 inches length. Please note there is no stretch. No trades please! Item will ship on Saturday since I work two jobs.