This publication is the first outcome of the Policy Lab 2.0, which sets it self as the result of the fruitful collaboration between cross-regional officers and stakeholders in the attempt of co-building new standards for circularity and providing effective solutions for the main challenges the European Regions need to face in the transition towards a Circular Economy. More in detail, it provides valuable insights into the creation of a common set of circularity criteria for the overall assessment of CE projects, with the aim of providing the European Regions with the right tool to foster a smooth transition towards a circular economy. It also emphasises the importance of promoting cross-regional knowledge through education and training.