The grade is only an estimate based on centering. It is not a guarantee to receive this grade by any grading service. The grade DOES NOT account for other card grading factors like edges or corners.
Full details:
Horizontal Left: 34 pixels
Horizonal Right: 28 pixels
Horizonal Ratio: 1.21
Vertical Top: 34 pixels
Vertical Bottom: 29 pixels
Vertical Ratio: 1.17