This repository includes data and materials for a series of studies into sound symbolism and category structure. This project is reported in the following Open Access article: Ković V, Sučević J and Styles SJ (2017). To call a cloud 'cirrus': Sound symbolism in names for categories or items. PeerJ, 5(e3466), 1-18. [https://doi.org/10.7717/peerj.3466][1] [1]: https://doi.org/10.7717/peerj.3466 With these materials you can: • replicate/check our existing analysis • do your own exploratory analysis to test a different hypothesis • replicate the main experiment, using our Superlab Code or re-implementing in another platform. • use these normed stimuli in new experiments with different designs. The collection includes the new Vincasso visual stimuli, designed for research into sound symbolism and category structure - along with full norms for each image's angularity and complexity. Audio recordings of Sound-symbolic words-forms in Serbian are provided with with summary acoustic analyses. We also include full data from the original series of experiments, and the original experimental Code in Superlab format.