title: iPhone 7 Plus background image size
body: <p>What are the proper dimensions of a background image on iPhone 7 Plus? I have seen answers which indicate 1242x2208 which gets downsampled to 1080x1920 on-the-go. I cannot understand, why 1242x2208 is the appropriate size, since 2208px/0.66 (equivalent to 2/3) is not equal to iPhone 7's height (1334px). I know I can make my image be 1334px, it wouldn't be a big problem. But I don't understand the math behind it.</p>