Handles and Heads
Racket head frames are typically either the classic oval or an isometric shape. The string bed is usually woven with 20 to 22 gauge strings with a tension between 20 and 30 pounds. While some designs have a throat section connecting the head's frame to the shaft, others have the shaft directly attached to the frame. The shaft connects the head, or throat, to the handle.
The overall length of the racket, which is measured from the tip of the head to the bottom of the handle, cannot exceed 680 millimeters or 26.5 inches. Regardless of the head's shape, the frame must not be wider than 230 millimeters or about 9 inches. The string bed must have a flat, uniform pattern and cannot be longer than 280 millimeters, or about 11 inches, and wider than 220 millimeters, or slightly larger than 8.5 inches.