The length and width of the circular hole are 5.71 * 4.33 inches, with an inner diameter of 1.93 inches and an outer diameter of 2.48 inches, resulting in an error of approximately 0.39 inches. The length and width of the circular hole are 14.5 * 11cm, with an inner diameter of 4.9cm and an outer diameter of 6.3cm, resulting in an error of approximately 1cm