Then he leaned over, and put a hand beside his mouth as if he did not wish to be overheard, an effect slightly lessened by his whisper, which was loud enough to deafen.
“I couldn’t help overhearing you fellows back then when you were saying how very I big I was, and I suppose you thought you were complimenting me. But if you ever make it to the North, you’ll meet proper giants, the really big fellows, and you’ll find out what a shrimp I really am. Skrymir grinned again, and then he stomped off towards the north, and the ground rumbled beneath his feet.Neil Gaiman – Thor’s Journey to the Land of the Giants, in Norse Mythology (see more here)
There are always bigger giants.