Waste pickers are recognised as a key stakeholder in the ongoing negotiations towards an international legally binding instrument to end plastic pollution. Up to 34 million waste pickers contribute to recovering close to 60% of recycled post-consumer plastic waste globally. The International Alliance of Waste Pickers (IAWP) has actively engaged in the negotiations to safeguard a just transition for these important but vulnerable and frequently overlooked workers. This article explores how the IAWP has gained prominence in the plastics treaty negotiations through three iterative processes. First, the reiterative naming of “waste pickers” has constituted a symbolic practice and discursive influence that heightened recognition of waste pickers’ role as knowledge and rights holders in a just transition to end plastic pollution. Second, the performative dimension of waste picker advocacy has influenced official and informal events. Third, by engaging in “scale work”, waste pickers have influenced and leveraged their alliances to work towards a just transition across national, regional and international levels. By examining the role and influence of waste pickers in the plastics treaty through the frames of naming, performance and scale, the article contributes to advance the scholarly literature on just transition and grassroots movements in global environmental governance (GEG).