As a rough guide, we recommend: Ski lengths to about nose height +/- 5 cm.
If you are frequently active in RACE or SPEED TOURING or at home in steep couloirs, then we recommend a shorter ski. If you are more of a classic ski touring enthusiast or more focused on the descent, then a longer ski could end up being more fun.
In addition, you should consider the following factors in a purchasing decision:
Ski style + terrain If you like speed when you are out and about, then you need more of a longer ski and that will offer less chatter. A longer ski can even come in handy when skiing lines in deep pow.
On narrow, steep slopes, however, preferably something shorter. Those who like short-radius turns will find their thrills in a somewhat shorter ski too.
Rocker: In skis with rocker construction it can be generally said that they can gladly be a bit longer. The longer the rocker (tip/tail), the longer the ski you can select.
Ski ability: Advanced and experienced skiers can up their fun in the snow if they choose a somewhat longer ski.*M
Height + weight: Larger, heavier skiers as well as more advanced skiers usually prefer a longer ski since they apply more pressure to the ski and can therefore experience a benefit of smoother skiing with less chatter. Smaller, lighter people as well as less experienced skiers usually feel more comfortable with the maneuverability of a shorter ski.