With the aim to integrate all our efforts to define consistent free and bonded vdW radii for hydrogen, in Table II we summarize all calculations presented in this work. The methodologies discussed can be categorized into three groups: free-atom based (dipole polarizability in Eq. 4, density cutoff, and QED photon cloud ), interaction of H 2 with closed-shell systems (H 2 dimers and noble-gas probes with H 2 ), and open-shell systems (H 2 triplet state and noble-gas probe with H atom). In the latter group, for vdW systems where the hydrogen atom is not covalently bonded, the largest vdW radii are obtained. This result is in line with the value R 0 reported by , which corresponds to a hydrogen atom approaching a halide dimer. Therefore, it clearly belongs to a different category of vdW radii. For the second group, we have vdW systems at equilibrium distances bonded mainly by intermolecular interactions involving neutrally charged closed-shell hydrogen atoms, or in a nearly isolated neutral state. Effective vdW radii in this category are in agreement with the averaged Allinger's equilibrium radii R e , Batsanov's radii R G , and positronbonded hydrogen anions, having values of 2.98 ± 0.10 Bohr. Since bonded atoms are usually more compact than free atoms, effective radii are lower than free radii. The small variation between all effective radii, estimated free-atom radii, and system-independent definitions indicates a high degree of consistency. Therefore, despite lacking a unique definition for the vdW radius, our comprehensive set of estimations results in a value of 3.16 ± 0.06 Bohr for the free hydrogen atom, excluding the radius from open-shell hydrogen system. This reduced range provides a significant improvement compared to the scattered results available in the literature as summarized in Figure .