The sandals are Jeffrey Campbell called the "Nena". I have the same pair from
www.singer22.com. A slightly modified version, called "Nena 2" is available at
www.nordstrom.com. Believe it or not the original version, with the bracelet closure, is also found at
www.aldo.com. I'm not sure what the connection is between Jeffrey Campbell and Aldo Shoes but the sandals at Aldo, call the "Vegetabile", appear to be an exact replica of the original version with the bracelet closure. Not to mention they are less expensive.