Surface averaged mean particle size, [μm] (Eq. (2)), for the hot giant gas planet WASP-43b, and the ultra-hot Jupiters WASP-18b, HAT-P-7b, WASP-103b, and WASP-121b. The lower right panel shows the day (solid lines) and nightside (dashed lines) averaged surface averaged mean particle size. The cloud particles sizes vary throughout the atmospheres with the largest particles occurring in the high-pressure, inner cloud layers. Cloud particles as large as 1 cm may occur in low numbers in the inner dayside cloud layers of ultra-hot Jupiters where nucleation is very inefficient, but present.