Measurements of the eggshells were made using the tomographic reconstructions and the calliper tool of VGstudiomax 2.2. For each measure, the structure was properly oriented in the tree orthogonal views, insuring the validity of the value. As the voxel size of the tomographic data is 5.06 microns, the measures are considered valid up to 2 pixels (10.12 microns). Measures were only taken on shell fragments that had slid inside the egg, to avoid potential structure damaged by weathering and diagenesis.