This dataset contains files and geometrical analysis of 3D model data, acquired from the thingiverse online repository. More than thirty thousand stereolithography files (STL) were retrieved and analysed. The geometrical analysis of the respective models is presented along with model renderings in both GIF and PNG format, and pre-sliced machine instructions as GCode. This dataset is intended to be used as a basis for further research in Additive Manufacturing (AM), such as 3D printing time estimation, printability assessment or slicing algorithm development. All files retrieved are user-generated, with the respective user and associated licence presented in the overview. The dataset was acquired between 2016 and 2017.