Get to know the iPhone 6 (pictures)

It's finally here, the iPhone 6, Apple's latest flagship smartphone. After years of phones with 4-inch screens, Apple has finally sized up, to 4.7 inches for the 6 and 5.5 inches for the 6 Plus. The 6 takes the place of 2013's 5S.

The newest iPhone doesn't deviate too much from Apple's signature design. It has a slightly updated rectangular shape and glass front panel. Like the iPhone 5S, the 6 comes in three color choices: Silver, gold, or space gray (black).

Like its predecessor, there's a smooth aluminum back cover, which keeps the phone light, yet sturdy.

Though the iPhone grew a bit, from 4.8 inches to 5.4 inches tall, the 6 is still small enough to fit in most pants pockets. That's not exactly true for the 6 Plus, which measures 6.2 inches tall and 3.06 inches wide.

Apple shaved a few millimeters off the depth of the iPhone 6, but with its curved edges, it looks even thinner.

Despite its many features, the iPhone is still a phone. Luckily, it fits nicely along your head to make the occasional call.

With the iPhone 6, you get the well-known white Apple earbuds and a Lightning charging cable.

The iPhone 6 ships with Apple's newest mobile operating system, iOS 8. It adds an updated keyboard, actionable notifications, and a link between iOS and Mac devices.

The iPhone 6 and 6 Plus are also getting their own set of features unique to the phones. One is Reachability, a set of gestures that make it easier to use your phone with one hand.

Also new with the iPhone 6 and 6 Plus is landscape mode, which displays select apps, such as web browser Safari, in a landscape orientation, for a different viewing angle. On the 6 Plus, the home screen will also go into landscape mode, but it won't on the 6.

iOS 8 introduces HealthKit, a system that collects fitness and medical data from your phone, fitness trackers, and health apps to give you an overall picture of your well-being. Above is the Health app, which culls all of the data into a central place.

The iPhone 6 sports the same 8-megapixel iSight camera and two-tone flash from the iPhone 5S, but it still has a few new tricks. Autofocus is the star this year, with a feature called "focus pixels" that cuts down on the number of blurry photos you shoot.

Those focus pixels also make videos look sharper than before. iOS 8 also lets you record time-lapse video.

Apple built a new processor for the iPhone 6, the A8, which promises fast speeds and smooth gameplay.

Introduced with the iPhone 5S, Touch ID lets you unlock your phone with your fingerprints. The iPhone 6 gets it too, and with iOS 8, other apps can use Touch ID for purchases or log-ins.

Like the iPhones that came before it, the 6 has a volume rocker and ringer switch on the left edge. This time, the controls get a bit slimmer.

Apple moved the power/lock button to the right edge of the phone, away from the top. Keeping it company is the SIM card slot. There's no expandable memory slot on this, or any other iPhone.

All of the ports are on the bottom of the phone. From left to right, it's the headphone jack, Lightning charging port, and speaker grill.

Apple keeps the top of the iPhone smooth and simple. That's a change from previous models, where the power/lock button usually took up some of that space.

The home button is still on the front bottom bezel. The ring around the button is for Touch ID, and you press the circle to wake the screen or control the phone.

The iPhone's color shows up on the aluminum back cover, which also features the classic Apple logo. Up top, you'll see the camera lens, which protrudes slightly from the body of the phone, and the flash.

Above, you can see how much darker the space gray color looks, compared to the white design on the silver model.

You can order the iPhone 6 now, and it hit stores on September 19. Prices start at $199 for 16GB of storage, $299 for 64GB, and $399 for 128GB, with a new two-year contract on AT&T, Verizon, and Sprint. Off-contract and unlocked prices are $649, $749, and $849 for the 16GB, 64GB, and 128GB models, respectively.

Though the iPhone 6 Plus isn't, on paper, much larger than the iPhone 6, the difference is apparent when you stack them.

Apple has slowly grown the size of its smartphone from the iPhone 4S (left), to the iPhone 5S (middle), to the new iPhone 6.

From small to large, Apple's mobile devices span a variety of sizes. In the last year, iPads have gotten smaller, and iPhones have gotten bigger to fit what customers want, and to compete with today's supersize Android phones.