Direct comparison of the degree of observed radius inflation and predictions from the magnetic SPOTS models. Points are color-coded by starspot filling factor, and the marker shape corresponds to the cluster. Inset plot shows the residual in the observed radius inflation parameter relative to model predictions. Bottom plots show the mean relation with just the individual stars of each cluster. The robust 1:1 correlation between the observed inflation values and the predicted values suggests that the magnetic stellar evolution model makes consistent radii estimates of inflated stars. Two points from Upper Sco (indicated by red upper limits) are not shown on the diagram, but they are still included in the fit.