Question: which iphone is the thickest?
Answer: As mentioned on Reddit, iPhones have gradually become thicker since 2014, capped off by the iPhone XR, the thickest model since the iPhone 4s in 2011: iPhone 6 and iPhone 6 Plus: 6.9mm and 7.1mm. iPhone 6s and iPhone 6s Plus: 7.1mm and 7.3mm.