On Wednesday, Apple announced the second-generation iPhone SE, originally released in 2016. The new iPhone SE will start at $400, using the same processor power as the iPhone 11, but at a lower price point.The new SE is the smallest available iPhone, and a good option for people who don't like the way iPhones have gotten larger over time. Now that Apple is selling a small phone again, size options vary widely.Here are the sizes of all the iPhones Apple sells, from smallest to largest, and how to know which is best for you.