This roundtable is organised as part of the OECD Programme on the Circular Economy in Cities and Regions – with the support of the European Commission. It will bring together key circular economy stakeholders in Tallinn, the EU’s 2023 Green Capital. This roundtable will enable stakeholders to share and learn from initiatives developed by cities and regions to implement the circular economy and advance on the measurement and monitoring agenda. It will also feature the launch of a new OECD report on the circular economy in Tallinn.