I read a couple other NG articles and GB said he had a 7'3" wingspan, also Kofi 7'6", and Hamlin 7'4.5", finally some size down low.Nice article about Jermaine Hamlin in the News Gazette https://www.news-gazette.com/sports/good-morning-illini-nation-underwood-talks-jermaine-hamlin-s-value/article_53a5bd78-7f12-5e32-a027-e3afd5e5c6b9.html
Supposedly he has a 7’- 4.5” wingspan. Underwood spoke highly of his defensive abilities calling him a quick twitch athlete. His length is very similar to Keon Clark from Danville who was a late bloomer as well and then went on to star at UNLV and play in the NBA. He had a lot of addiction issues though.