Authenticity and physical descriptions regarding the height of Al-Abbas ibn Ali
Is it authentic that Abu Fadhl Abbas (as) was so tall that his feet touched the ground while on horseback? If so, does this mean he would have been 10 feet or taller?
Yes. Our master Abul Al-Abbas (AS) was tall that his feet touched the ground while he was on the horseback.
This has been mentioned even in Sunni books like Maqaatil Al-Talibiyyeen by Abul Faraj Al-Asfahani (page 56) and Maqtal Abi Makhnaf (page 176).
It has been mentioned in many Shia books like Ma'alim Al-'Awaalim by Al-Bahrain (page 283) and Biharul Anwaar (Volume 45, Page 39) and Lawa'ij Al-Ashjaan by Sayyed Mohsin Al-Ameen (page 179) and many other books.
Wassalam.