The MOFs studied in this work have similar geometric features, such as low density and high pore volume (Table ). To put these values in context, at the time of writing, the MOFs can feature densities as low as 0.124 g cm -3 45 and pore volumes up to 5.02 cm 3 g -1 . For conventional porous materials, such as zeolites, densities of ≈ 1.0 g cm -3 are common. These MOFs are impressive structures with unique pore volumes and have all been experimentally measured. The KDE recreates the important features of the pore size distribution as demonstrated in the Supplementary Figure , which display the pore size distribution histogram and the resulting KDE. Pore variations are reproduced well however for extremely narrow pore distributions this may not be acceptable and a narrower bandwidth value should be chosen. In general, a bandwidth value of around 1.0 Å produced a reasonable estimate, however, for NU-1000 this was increased to avoid too much noise. The pore size distributions based on KDEs are displayed in Fig. . These distributions clearly describe the key features of the void space found within these MOFs. The broad nature of the pores in DUT-32 can be observed stemming from the cage like structure of this material where as the one-dimensional pores of NU-1000 and UMCM-1 produce narrow peaks. Continuous features of the KDE function were analysed to capture the maxima of the peaks and the minima to provide limits to the pore environments. The summary of peak maxima are displayed in Table . The pore size distributions highlight the shear size of the pores in these materials and the breadth of pore sizes contained within NU-1000.