We don't build wooden ships anymore. There are no size limits for steel, and eventually the ship gets so big that weather just won't affect it much.

The Seawise Giant was 2.5x bigger than an American supercarrier. If there were a shipyard big enough to do it, there is nothing stopping us from building a ship 10x bigger, or even 100x bigger except the price tag and the lack of logical reasons to ever build such a ship due to how impractical it is