The badminton rules have very detailed regulations on badminton rackets in 4 sections and 12 articles, including instructions on racket size. 1: The length of the racket shall not exceed 680 mm and the width shall not exceed 230 mm. 2: The racket string surface should be flat, woven with the racket strings passing through the racket head in a cross or other form. The weaving pattern should be consistent, especially the density of the weaving in the center of the string surface should not be less than that of other parts. The length of the string surface shall not exceed 280 mm and the width shall not exceed 220 mm. Regardless of how the strings are tightened, it is stipulated that the area where the strings penetrate the connecting throat shall not exceed 35 mm, and the entire string surface including this area shall not exceed 330 mm.

There are currently two main shapes of rackets: round-head rackets and square-head rackets. The round-head racket is a traditional racket shape with a slightly pointed upper part and an oval shape as a whole. This oval racket has a smaller sweet spot, but the power burst is very concentrated in the sweet spot. Round head rackets are more difficult for beginners to use. At present, there are not many racket models with this type of racket head. The square-head shot (ISO shot face) is a rising star. It quickly became popular all over the world in the early 1990s because of its huge sweet spot.

The stiffness of the racket is similar to the tension of the string. Stiffer racquets require more power to drive and vice versa.

Racquet weights vary. Common racket weight range is generally 80-95 grams. Like the racket handle size unit, different manufacturers have their own weight unit definitions, but the most popular one is the U system used by YONEX. U=95-100 grams, 2U=90-94 grams, 3U=85-89 grams, 4U=80-84 grams, 5U=79-75, the commonly used rackets are basically 2U-4U, below 79 grams Generally called a super light racket, it is mainly designed for women or golfers with special needs. Those above 95 grams are generally metal rackets, mainly for people who play badminton as a means of fitness and do not want to spend too much on equipment.

The weight of the racket determines the swing speed. Using the same swing power, a lighter racket can produce a higher swing speed. Simply put, the lighter the racket, the more flexible it is to use. But the lighter the racket is not, the better, because the lighter the racket, the more unstable it is and the more strength it requires to maintain its trajectory. A heavier racket can carry more kinetic energy when swinging, and can generate greater potential energy at the moment of hitting the ball. This is why many offensive racket heads are heavier.

The balance point of a racket determines the weight distribution of a racket. Many rackets on the market are already head-heavy. Head-heavy rackets can be more stable when swinging, while balanced rackets are more flexible.

The choice of racket is very personal, and no one can say that certain characteristics of one racket are necessarily better than another. You can refer to some professional opinions when choosing a racket, but in the end it is up to you to decide.