Center restraining circle, division line
Rule 1-3-1
ART. 1 . . . A restraining circle shall be drawn at the center of the court with a radius of 6 feet measured to the outside edge. The edge of the circle shall be designated with a minimum of a ¼-inch-wide single line but no wider than 2 inches. See Table 1, No. 3 if the use of contrasting colored-floor areas instead of a line is desirable. Spaces for nonjumpers around the center circle are 36 inches deep.