I thought it was CelebA-HQ (https://drive.google.com/drive/folders/0B4qLcYyJmiz0TXY1NG02...) but the article states that they have made a better dataset; which isn't published yet but promised to be published in January at https://docs.google.com/document/d/1SDbnM1nxLZNuwD8fQkIigUve...