Top panel: evolution of the surface equatorial velocity as a function of the age of the star for stellar models with various initial masses, metallicities, rotations, and surface magnetic fields. The shaded areas show the range of values for the surface equatorial velocity that can be deduced from the observed rotational period and from the stellar radius determined from the angular diameter and the Gaia distance. Bottom panel: evolution of the stellar radius as a function of the age of the star for stellar models with various initial masses, metallicities, rotations, and surface magnetic fields. The light shaded area shows the range of values for the stellar radii that can be deduced from the angular diameter and the Gaia distance.