String Gauge
Tennis strings are made in various gauges. The thicker the string gets, the more durability and control it will provide. Thinner strings will offer more power and comfort. The most common string gauges (mm) are:
1.20
Slightly thinner string; best suited for players seeking some extra power and comfort.
1.25
Average string gauge; best suited for players seeking a combination of power and comfort.
1.30
Slightly thicker string; best suited for players seeking extra durability and control.