The bare bones, entry level Garmin has finally arrived: Introducing the Garmin Forerunner 10. This little beauty is available in 2 different sizes, and 3 different colors. In the smaller size, it is available in pink and green. In the slightly larger size, it is available in black. The smaller size measures 1.58” by 2.05” by .62”. The larger size measures 2.1” by 2.4” by .6”. Built to provide exactly the speed and distance features runners need in a no-frills package. Not compatible with heart rate monitors.