For a comparison, I bought a pack of Pop-Tarts. Frosted Strawberry Pop-Tarts, specifically requested by my colleague Megan Rose Dickey.
Here's the iPhone 5 next to a Pop-Tart, next to a Galaxy Note 3. The phablet is a monster.
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The iPhone is a little longer than the Pop-Tart, but it's much skinnier. The Galaxy Note 3 is the same width as the Pop-Tart, gobbling up the iPhone 5. (Apologies for the grainy photo, that's just my iPhone 4S' quality).
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The Galaxy Note 2 was also larger than a Pop-Tart.
All of this not only made me hungry, it also made me really feel my iPhone 4S is completely inadequate. Come Christmas, I'll be begging for a Samsung phone. At least until the 4.8-inch iPhone 6 comes out.