It was narrated from Muhammad bin `Ali (رضي الله عنه), that his father said: The Messenger of Allah (ﷺ) had a large head, big eyes with long eyelashes, reddish eyes, a thick beard, a pinkish colour and large hands and feet; when he walked, it was as if he was walking uphill - Al-Hasan said: He leaned forward - and when he turned, he turned with his whole body.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَفَّانُ، وَحَسَنُ بْنُ مُوسَى، قَالَا حَدَّثَنَا حَمَّادٌ، عَنْ عَبْدِ اللَّهِ يَعْنِي ابْنَ مُحَمَّدِ بْنِ عَقِيلٍ، عَنْ مُحَمَّدِ بْنِ عَلِيٍّ، رَضِيَ اللَّهُ عَنْهُ عَنْ أَبِيهِ، قَالَ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ضَخْمَ الرَّأْسِ عَظِيمَ الْعَيْنَيْنِ هَدِبَ الْأَشْفَارِ قَالَ حَسَنٌ الشِّفَارِ مُشْرَبَ الْعَيْنَيْنِ بِحُمْرَةٍ كَثَّ اللِّحْيَةِ أَزْهَرَ اللَّوْنِ شَثْنَ الْكَفَّيْنِ وَالْقَدَمَيْنِ إِذَا مَشَى كَأَنَّمَا يَمْشِي فِي صُعُدٍ قَالَ حَسَنٌ تَكَفَّأَ وَإِذَا الْتَفَتَ الْتَفَتَ جَمِيعًا.
sunnah.com