This paper analyzes the diversity of small-scale producers and demonstrates how understanding small-scale production can have consequences for how policies and investments are directed and how they impact small-scale producer livelihoods. The diverse roles and functions of small-scale production are presented as being essential to realizing sustainable agrifood systems transformations and respecting its social, environmental and economic dimensions. Constraints faced by small-scale producers in accessing the assets, financial and knowledge services and market positioning that can support profitable livelihoods are examined.