Actor Peter Mayhew was 7' 4" tall, and the man inside the wookiee costume. He played Chewbacca in Star Wars (1977), The Empire Strikes Back (1980), Return of the Jedi (1983), Revenge of the Sith (2005), and The Force Awakens (2015).
From Vintag.es: "Mayhew also served as a consultant on The Last Jedi to help new Chewbacca actor Joonas Suotamo. Mayhew was a fixture on the convention scene over the years and was always more than happy to take a picture with Star Wars fans who could not believe they were meeting the man behind the iconic growl."
Mayhew died April 30th this year in his North Texas home with family by his side, according to his official Twitter account.
Many more photos at this link (and even a few more in color).
PS: Han shot first. That is all.