The display is 5.5 inches (diagonal). The front is flat with curved edges and is made of glass. The back is anodized aluminum with a laser-etched "S". The Sleep/Wake button is on the right side of the device. The Home button has Touch ID. There's a True Tone LED flash on the back and a SIM tray on the right side that holds a "fourth form factor" (4FF) nano-SIM card. The IMEI is etched on the SIM tray.