For this data in brief article, the same initial datasets as already described in  were used, all of which are available from public repositories. Four large datasets with rigorous quality control mechanisms were selected, two for imaging data from children (the National Institute of Health's Study of Normal Brain Development  and the Cincinnati MR Imaging of Neurodevelopment study ) and two for imaging data from adults (The 1000 functional connectome study  and The Information eXtraction from Images study ). Following additional local quality control, a total of 1919 high-resolution 3D T1 images could be included. See Table 1 for demographic and imaging details of all included subjects. Further details on all subjects as well as respective credits, sponsors, and disclaimers can be found in the Supplementary material S1.Table 1Demographic information about all 4 contributing and the full dataset; n=number; T=Tesla. Values are described as sums or mean±SD. See text for details.Table 1nAge [months]Voxel volume [µl]Image quality [%]1.5 T [n]3 T [n]NIH414122.41±52.150.99±.0876.47±10.394140C-MIND20699.87±55.80.99±.0679.23±9.270206fCONN757331.76±156.351.18±.3282.72±2.8715742IXI542571.84±187.541.05±.0383.81±1.98178364Full Dataset1919329.51±228.031.08±.2281.31±6.76071312