It is challenging currently to design for super small phones (iPhone 5 and smaller) as the phone breakpoint just does not have enough options at the moment. One issue we run into constantly is an iPhone 6/6s/7 with the screen zoom feature turned on. The layout that looks good on the normal iPhone 6/6s/7 zoom becomes too large and ugly with the zoom function turned on. This is becoming quite a large issue for our team and our designs. Please consider another breakpoint for super small phones, and/or redesigning the breakpoint system to give us designers the flexibility of adding or removing breakpoints as needed, rather than being constrained to arbitrary, one-size-fits-all breakpoints.