Penalty area

“The penalty area or 18-yard box (also known less formally as the penalty box or simply box) is an area of an association football pitch. It is rectangular and extends 18 yd (16 m) to each side of the goal and 18 yd (16 m) in front of it. If any part of the ball is over any part of a line demarking the penalty area then the ball is considered to be inside the penalty area. Within the penalty area is the penalty spot, which is 12 yd (11 m) from the goal line, directly in line with the centre of the goal. A penalty arc (often informally called ‘the D’) adjoins the penalty area, and encloses the area within 10 yd (9.1 m) of the penalty spot. It does not form part of the penalty area and is only of relevance during the taking of a penalty kick, when any players inside the arc are adjudged to be encroaching. …”
Wikipedia