Komar mass M_k against circumferential radius R_c for un-magnetised, static models of NSs computed with the EoS described in Sect. 3 in GR. The EoS are colour-coded, and ordered in the legend, according to the compactness C = M_k/R_c calculated at M_k = 1.4 M_⊙ in GR: red for the highest compactness and blue for the lowest compactness. The black dashed lines denote isolines. The two values containing the magenta highlighted area are those found in the case of the example in Sect. 7.