In one implementation, a system for three-dimensional object model tagging includes a model engine to generate a model of a three-dimensional (3D) object from a pre-scan of a 3D object; an analysis engine to analyze the model to identify a property of the 3D object predictive of a reconstruction of the 3D object; a tag engine to generate a tag that describes the identified property based on the analysis; and a display engine to display the tag.