Board Thread:Theories and Speculation/@comment-3568954-20150602045122/@comment-24075086-20150607214605

At the very most their planet is the same size as ours, because of one simple thing: physics. Assuming their earth has the same composition (density) as ours then if the surface area was even slightly larger then the mass would be monumentally so. Larger mass translates to larger amounts of gravity and even a small increase in gravity would require compensation from the lifeforms and building structures on the planet. So far we have seen no signs of the Narutoverse organisms being much thicker built than ours and no evidence that their buildings are any more built to withstand gravity's effects. As their organisms and buildings are the same as ours then if their gravity was indeed greater then those things wouldn't be able to support their own weight.