I need to go buy this month's edition of Elle, because that skirt is featured in it (there's a PR layout in it, actually). I think I could recreate the effect with a regular wraparound skirt pattern with an adjusted/elongated waist and enlarged "ties" (as opposed to string-like ties that most wraparound skirts have). Probably the most challenging aspect would be adjusting the waist length.

Sewing just takes a lot of practice!