Masses and radii of M-dwarfs in five EBLM systems. The 5 Gyr isochrone for solar metallicity from Baraffe et al. (2015) is plotted (black-solid) along with the 5 Gyr isochrone for [M/H] = −0.5 (Baraffe et al. 1998; black-dashed). We plot low-mass M-dwarfs with masses and radii known to better than 10% (from Table 4 of Chaturvedi et al. 2018, and references therein). For J2308−46 and J0218−31 we plot both solutions and label accordingly. We also plot TRAPPIST-1 (Delrez et al. 2018), Proxima Centauri (Anglada-Escudé et al. 2016) and J0555−57 (von Boetticher et al. 2017).