The SR-C is a repair center for the SR target, which is a military target. This target is for 200 Yards ,printed on high quality paper. The size of each ring is as follows: X ring . . . . . . . . 3.00" 10 ring . . . . . . . . 7.00" 9 ring . . . . . . . . 13.00" 8 ring . . . . . . . . . . 19.00" 7 ring . . . . . . . . . . 25.00" 6 ring . . . . . . . . . . 31.00" 5 ring . . . . . . . . . . 37.00" .”