Eco-design is emerging as a key approach to address critical environmental challenges and negative impacts of the fashion and textiles industry (FTI). As global policymakers promote strategies and legislation to drive circularity through increased product durability, reparability and recyclability, stakeholders need to understand how to engage and implement effective eco-design practices. The core principles of this approach involve building environmentally sustainable products through consideration of the complete life cycle, from raw material extraction to end-of-life disposal. Developing such a holistic account of environmental indicators requires the application of science-led frameworks and assessment methodologies utilised to quantify impact and informing viable design solutions. This chapter supports eco-design values by drawing on literature to explore the tools, methods and platforms that are currently used to collate and communicate the various impacts of the FTI. Additionally, a breadth of stakeholder perspectives activated through participatory workshops are presented, highlighting barriers and challenges of existing applications as well as opportunities to transcend disciplinary boundaries in support of eco-design practice.