I took it upon me to review various recent tyshawn parts. I came to the conclusion that he has very large feet and skates board of ragualar width. I compared his feet and his deck size to different skaters that appear in videos next to him. I would say he skates decks in the range of 8.25 or 8.4. His feet must be size 14 or more.
No, I don't have anything better to do. I am killing time to later meet a friend to go skate the one street spot in my city, where people have not been threatened with large fines for skateing during the pandemic.