Which are the main circularity trade-offs to be solved? Which are the obstacles & advantages of implementing circularity in fashion? How to shift from linear to circular fashion business models in fashion? Which are the main circular business models in fashion? The Toolkit touches on these relevant questions, drawing on relevant sources to go more in depth in the analysis. By shifting focus from a linear to a circular approach, fashion enterprises can gather important benefits including improved brand reputation and final user loyalty, new business opportunities and new jobs. Traceability and transparency are important enablers to accelerate the sustainability and circularity journey.