What is the size of a German U-boats?

U-boats came in various sizes. The U-boats used by the German Navy today are rather small in comparison to the submarines of other nations. The U-boats of World War 1 were large for their day, but small by World War 2 standards. In the 1930's the major navies of the world began building large "cruiser submarines" which were considered huge at the time, but they were still smaller than some of the subs used today. The "U-cruisers" of the German Navy were no more successful in battle than any other U-boats, and they were expensive to build, so in World War 2 the Germans stopped building them. By researching U-boats using their Roman numeral type, you can get their exact length, beam, and displacement.