I broke iPhone 4, 5, 5s and 1 st. Gen. SE. All of them are quite small, and all also the 4th are light as well. I use cases, but those light ones, so they don’t add weight and add some protection. Mostly from scratches. In my case, all of them fell from some surface onto the floor. Usually it’s a metre distance. I think I never dropped a phone from my ear height, so not even 2 m.