String surface area
There is a simple pattern here: the larger the area of the string surface and the lower the rigidity of the string tension, the higher the impact force and the lower its accuracy. This parameter is directly related to the string formula.
Now on the market there are rackets with the following string surface area:
Midsize (452 – 574 cm²),
Midplus (580 – 677 cm²),
Oversize (710 – 742 cm²).
Balance
By balance, it meant the conditional point of the centre of gravity of the racquet, in other words, the point at which the handle and head of the racquet will have the same weight. Three options are possible: balance in the head, in the handle, or neutral. The number specified in this parameter is the distance from the end of the handle to the balance point. Important clarification: balance is measured without strings!
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Head. This means that the head of the racquet is slightly heavier than the handle. In fact, this can provide some advantage in hitting and serving.
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Handle. The balance of such a racquet is in its handle, from which we can conclude that the model is more manoeuvrable and can best perform when playing under the net.
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Neutral. The balance of this racquet is in the middle, meaning it will not provide any advantage to the player regardless of playing style.
Handle size
It is customary to read that the thickness of a tennis racquet should be such that when it is grasped between the fingers and the palm there is a gap slightly larger than the thickness of the index finger. There are two generally accepted systems for measuring handle thickness: American and European. If within the first one, the indicator is measured in inches, then within the European one — in integers from 0 to 5, where zero is the smallest size. Usually, each racquet is presented on the market with modifications with a different handle diameter. So, the indicator "1-5" means that the model is represented by modifications with a handle diameter of 1, 2, 3, 4, 5. Exceptions may be some children's rackets, for which the manufacturer sometimes does not indicate the diameter of the handle, since it is less than size 0.
Weight
As the weight of the racquet increases, the impact force increases, but its accuracy decreases. On the contrary, it is easier to swing
with a light rocket, but at the same time, the player needs to make more effort to give the ball the desired speed.
