Comparison of temperatures and radii derived using relations from Newton et al. (2015) and Mann et al. (2015). The gray lines connect the values from the Newton relations (blue circles) and Mann relation (green squares) for each star. The three mid-M dwarfs highlighted with light blue circles have Al-a EW below the calibration range for the Newton temperature relations. For those three stars only, we adopt the Mann parameters instead. For reference, the purple line displays the third-order temperature–radius polynomial presented in Equation (8) of Boyajian et al. (2012).