Board Thread:Naruto Discussions/@comment-30881771-20181121134549/@comment-31099706-20181121140010

I think it's one of the little details changed from the Original. Instead of being immensely Titanic in size, they are smaller in Shippuden, enough small for a shinobi to have any chance. The Tailed Beasts and the Summons(They had their size change too) got smaller than usual. This is the reason, I think.