Yeah that phrase is my writing. I tried to clean up the atrocious English from before. I am not sure how to word it exactly. If the claims of 400-600 feet in length are accurate, these were certainly the largest wooden ships of all time. However, no one who knows much  seriously believes these claims. If you look on the talk page, a naval architect did some calculations to prove in several ways that these ships had dimensions that are impossible, or at least highly unlikely and probably exaggerations or mistaken.