When shot putting, you must stay within the circle during the entire throw. The circle is usually painted on a slab of concrete, and is 7 feet (2.13 meters) wide for official competitions. If you step outside the circle during the throw, it is a foul and is not counted in the competition.After throwing, the athlete must exit the circle through the back half of the ring, not the front, or the throw becomes a foul. (This avoids arguments over whether an athlete stepped over the line during the throw or afterward.)The circle usually has a toe board in front that will block the athletes foot from going too far forward. You are not allowed to step on top of the toe board.