Ka’ab ibn Malik (R.A) said, “When I greeted the Messenger of Allah, whose face was glittering with happiness, for whenever Allah’s Messenger ﷺ was happy, his face used to glitter, as if it was a piece of the moon, and we used to recognize it (i.e. his happiness) from his face.” Once Al-Baraa (R.A) was asked whether the Prophet Muhammad ﷺ face was like the sword to which he replied: No, it was like the moon.

On the authority of Umm Ma‘bad ‘Atikah bint Khalid al-Khuza‘iyyah (ra) who said: ’I saw a man of visible radiance and purity, beautiful appearance, bright faced, with neither protruding ribs nor a small head, handsome and fair. His eyes were deep black and large, and his eyelashes were lush. His voice was mellow and soft. The whiteness of his eyes was bright and his pupils were very black. His eyebrows were beautifully arched and connected. His neck was long, his beard densely full. When he was silent, he appeared dignified. When he spoke, he was eminent and crowned with magnificence. His speech was sweet, his words precise, neither too little nor too much. Like a string of pearls flowing down gradually.

https://ia600405.us.archive.org/9/items/NABIAPPERANCE/NABIAPPERANCE.pdf