I hate to be the person to break this to you, but the iPhone 5S in your pocket or purse is tiny. It's so small by today's smartphone standards that Sony released a compact version of its flagship that's still a whole lot bigger than the 5S. It was time to grow up. And the iPhone 6 has done that beautifully.
That's not to say that bigger is definitionally better; Motorola overshot the mark with its hulked-up new Moto X, and Apple's own iPhone 6 Plus feels like you could deliver a pizza on it. But after a brief time fondling the 4.7-inch iPhone 6—up from a 4-inch predecessor—I feel comfortable saying that this is the right kind of sizing up.