This tool is an improved version of the Graphic Training Aid 5-2-12 Coordinate Scale and Protractor. By using a slot on one side of the tool for access to the map, the tool can be more compact than the traditional GTA tool. The tool features several additional map scales, including 1:24,000, which is the most common topographical map scale found within the United States, including the 7.5 minute USGS maps. The 1:100,000 scale now spans 5km grid lines, making it much more usable. Plus the overall dimensions have been reduced so that it is the size of a music CD, easily fitting into a pocket or any slot where you could store a CD. The tool is printed on 30 mil plastic with a protective coating. This makes it about the thickness and stiffness of a credit card. It's 33% thicker than the standard military issue version, so it's less likely to be bent or broken when you need it. It has rounded corners which keep it from wearing holes in your pockets. Scales: 1:24,000 x 1km, 1:25,000 x 1km/1:250,000 x 10km, 1:50,000 x 2 km/1:500,000 x 20km, 1:10,000 x 500m/1:100,000 x 5km. Compass Rose in both Degrees and Mils. Measures 4.5" x 4.5".