You're half giant? [He's actually surprised enough by this revelation that it shows on his face despite his usual unflappable deadpan.]

There is a giant devil fruit, aye. But some people in my world are more giant in size just by other things. I'm practically the shortest of my brothers. Jozu, Atomos, and Blenheim are four times my size, and even Vista and Curiel are nearly ten feet tall.