The green part of the circle is 6.5 inches on the target. I shot at 50 yards with iron sites and no support. One thing I do with a 5 LB + gun and 7.5" barrel, I hold the gun upright with elbows at 90 degrees. Then I slowly start bringing the gun down and when I get to locked elbows and on target, I squeeze the trigger. Holding the gun straight out and steady without support is difficult. I can do it but the target will look like a shot gun was used.