Head Size
Refers to size of strung area of a racquet and usually measured in square inches. A larger head size provides more power and a larger sweetspot, while a smaller headsize gives you more control, ATBE. Although no industry standard exists, the current unofficial classifications are:
Head Size Square Inches Square Centimeters
Midsize: 85-92 548 – 593
Midplus: 93-105 594-677
Oversize (OS): 106-115 678-741
Super OS: 116+ 742+