A group of five small countries have announced that they will launch negotiations on a new Agreement on Climate Change, Trade and Sustainability, which, if successful, would constitute the first international trade agreement focused solely on climate change and sustainable development. The initiative also breaks new ground by aiming to simultaneously remove barriers for trade in environmental goods and services and crafting binding rules to eliminate fossil fuel subsidies. Small countries can pioneer the development of new trade rules that can help achieve climate goals, but making credible commitments, attracting additional participants, and ensuring transparency will be essential ingredients for long-term success.