Micro, small, and medium-sized enterprises (MSMEs) account for over 90 percent of registered enterprises in the UNECE region, spreading from North America to Central Asia. These enterprises hold immense potential to drive the transition towards a circular and green economy due to their agility and localized operations. However, they often face challenges such as limited access to finance, a lack of technical knowledge, and regulatory and procedural barriers that hinder their ability to fully leverage circular and sustainable practices. To support MSMEs' efforts to embrace green and circular economy principles and engage in sustainable trade, UNECE developed a compendium of resource material, "Harnessing Opportunities from the Circular and Green Economy: Compendium of Guidance Resources for Micro, Small, and Medium Enterprise (MSME) Development". The Compendium offers guidance for enterprise owners, entrepreneurs, and policymakers in the region and beyond.