Rihanna: Adidas Sweatshirt, Air Jordan Sneakers

Rihanna at Tivoli Garden Amusement Park in Copenhagen July 4, 2013 – photo: rihannaphotos.org
Rihanna visited the Tivoli Garden Amusement Park yesterday wearing an oversized Adidas Originals C90 Art Fleece Sweatshirt ($80.00) as a dress, her Air Jordan Retro 13 Sneakers ($210.00-$249.00) and her Ray-Ban Wayfarers ($130.00). You can get a similar bandana from Full Tilt ($3.99).
What size is her adidas oversized sweat?? I want it to fit like a dress a like in the pic.