How long should my classic skis be?

Classic skis are typically sized 15–25 cm above your height. For example, a 170 cm skier would look at skis in the 185–195 cm range. However, flex matching is more important than length—if a ski that's slightly shorter has the correct flex for your weight, it will perform better than a longer ski with incorrect flex. Very tall or heavy skiers may need to size up, while lighter skiers may size down. Always prioritize flex over length when the two considerations conflict.