In what position does the moon have a larger angular diameter: when is it closer to the zenith or to the horizon?

A simple geometric construction proves that, being at the horizon, the Moon is farther away from the observer and, therefore, has smaller angular dimensions than when it is at its zenith. The apparent increase in the angular dimensions of the Moon at the horizon is due to the peculiarities of visual perception, due to which extended objects, visible in the horizontal direction, appear larger than when they are visible overhead.