This document introduces the concepts of eco-design and circular economy. It describes eco-design as considering a product's environmental impact over its entire lifecycle from raw material extraction to disposal. The principles of eco-design include using fewer resources, reducing waste and pollution, optimizing product lifespan, and making products easier to reuse, repair, and recycle. Key decisions made during the design phase impact how resources are used throughout a product's life. Case studies demonstrate how eco-design has been applied to different product types.