Your phone is thin. Your laptop or tablet is thin. So why not your watch? The Tag Heuer Carrera CH 80 Chronograph Watch fits the bill, boasting a high-tech Calibre CH 80 movement that offers an 80-hour power reserve yet measures only 6.5mm thick. On the outside, you'll find a traditional chronograph face with a minutes counter at 3 o'clock, an hours counter at 9, and a small seconds at 6, a polished steel case with faceted lugs, a racing-inspired perforated calfskin strap with red lining, and, of course, a sapphire crystal case back so you can admire the engineering.