Ski width dimensions are indicated with three values referring to the measurement (in millimeters) of the ski’s Tip/Waist/Tail in that order. For example, a ski with dimensions of 117/99/112 has a tip width measurement of 117mm, a waist width measurement of 99mm, and a tail width measurement of 112mm. Tip and tail measurements are taken at the widest points of the ski, and waist measurement is taken at the skinniest part of the ski. The waist of the ski typically coincides with the factory recommended boot-sole-center mounting position.

The “sidecut'' of a ski is created by the difference in width between the tip/tail and the waist of the ski. The radius of a ski or snowboard is the measurement of the imaginary circle (in meters) created by a ski’s sidecut if it continues in its circular pattern. Shorter radius skis are meant to turn quicker. A longer radius ski is more stable at speed and makes larger turns. Beginner to intermediate skiers are more comfortable on a shorter radius ski because it is easier to make a tighter turn and thus control the ski. Though skis are designed with many different applications, longer radius skis are better suited to advanced and expert skiers.