It was narrated that ‘Ali (رضي الله عنه) said: The Prophet (ﷺ) had a large head, a reddish complexion, large hands and feet, a large beard, a long line of hair from his chest to his navel, and large joints. He walked as if going downhill, energetically. He was neither short not tall. I have never seen anyone like him before or since.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا أَسْوَدُ بْنُ عَامِرٍ، حَدَّثَنَا شَرِيكٌ، عَنِ ابْنِ عُمَيْرٍ، قَالَ شَرِيكٌ قُلْتُ لَهُ عَمَّنْ يَا أَبَا عُمَيْرٍ عَمَّنْ حَدَّثَهُ قَالَ عَنْ نَافِعِ بْنِ جُبَيْرٍ عَنْ أَبِيهِ عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ضَخْمَ الْهَامَةِ مُشْرَبًا حُمْرَةً شَثْنَ الْكَفَّيْنِ وَالْقَدَمَيْنِ ضَخْمَ اللِّحْيَةِ طَوِيلَ الْمَسْرُبَةِ ضَخْمَ الْكَرَادِيسِ يَمْشِي فِي صَبَبٍ يَتَكَفَّأُ فِي الْمِشْيَةِ لَا قَصِيرٌ وَلَا طَوِيلٌ لَمْ أَرَ قَبْلَهُ مِثْلَهُ وَلَا بَعْدَهُ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ.
sunnah.com