Welcome .
Thanks for your detailed comment.Greetings, The most commonly used competition targets in France,Germany, Japan and the U.S. Have three scoring zones measuring 6, 12 and 18cm. I often tell newbies to start training at a shorter range and when they stop hitting outside the 12cm circle, they are ready to shoot at a greater distance. If you make your own targets, the 12mm circle is the same size as a standard DVD. Enjoy