Extended Length Racquets: Extra length for better reach and power

A standard tennis racquet comes in a length of 27 inches and is the most commonly used length. Extended-length frames are generally 27.25 inches, 27.5 inches, and 28 inches, but they have to be 29 inches or shorter (which is the official limit). Some professional players who use extended-length frames are Serena Williams, Diego Schwartzman and Kei Nishikori.

Benefits of extended-length racquets:
An extended-length racquet has several advantages. One of the biggest is that it gives you extra reach on the serve

• Better Reach - which can be beneficial while taking balls on the run, while serving, the return of serve, overheads, on double-handed strokes and up at the net.
  Shorter players also do benefit from the better reach, by making contact with the ball higher up on serve, you can achieve a higher margin of error and produce more ball speed, which is why Michael Chang opted for a 28-inch frame.

• Higher Swing Weight - which results in better stability and more power (The longer the racquet the higher the swing weight and the better the reach).
  A higher swing weight without an increase in static weight.

Downsides to playing with extended length racquets are:
More power, more stability, better reach with a light static weight, sounds like a perfect choice, doesn't it? But there’s a trade-off, and by extending the racquet, you sacrifice maneuverability. The racquet becomes harder to swing and slower through the air and won't be suitable for players who are used to whippier maneuverable racquets.

If you are a player that wants more plow through, power, reach and is willing to sacrifice some maneuverability for it. Then using an extended-length racquet could be the perfect choice for you.