Financing Nature: A Practitioners Guide to Results Metrics Selection offers a voluntary, practical framework to support the selection of metrics for monitoring the outcomes of nature finance initiatives. It addresses common challenges faced by practitioners in identifying robust, context-appropriate metrics and provides actionable guidance to improve the design, implementation, and evaluation of nature finance instruments. By promoting the use of relevant metrics throughout the life cycle of financial instruments, the Guidance enhances adaptive management, strengthens market confidence, and supports alignment with global biodiversity goals, such as those outlined in the Kunming-Montreal Global Biodiversity Framework (GBF). The Guidance helps practitioners articulate how financed activities contribute to nature outcomes by mapping objectives to impact pathways and selecting suitable metrics based on available data and capacity. The Guidance introduces a typology of metricsResponse, Pressure, and Stateto improve clarity, transparency, and comparability of reported results. It is applicable across a wide range of financial instruments (e.g., debt, equity, guarantees) and project types, including those aimed at conservation, restoration, or reducing drivers of nature loss. It also serves as a reference for stakeholders such as government, MDBs, financial institutions, advisors, certifiers, regulators, and rating agencies. The package includes the main Guidance document, a draft metrics framework, implementation templates, and a growing library of case studies. It is designed for flexible use, either as a complete process or through individual components tailored to specific needs.