The discussion of ski length & width is not just about ease of turning UNLESS your B/C goal id mainly finding fresh pow to carve up.
If, as Dave said, you are winter "backpacking" on skis to tour and not carve a lot of turns then longer, narrower skis will float you and permit easier distance-covering tours.
Also it has been mentioned that ski length is related also to your weight WITH a backpack (not day pack) on your back then you add the pack's weight to your fully-clothed-and-booted weight to determine ski length,
I'm an old school skier and used to 210 cm. skis so I can handle them. Yeah, I could have used 205s but they were not available at the time and 210s were managable for touring, but NOT tree skiing.
So with a nude weight 0f 185 lbs., at 5' 10" I know I'll weight around 250 lbs. clothed & booted and wearing a 40 lb. pack W/five days' food, double wall tent and winter sleep system plus MSR Dragonfly stove. Thus those 210 cm. skis will give me enough flotation.
My Asnes military skis are waxable skis but I have climbing skins if needed and also quick attatch/detach "ski crampons" when the slope is not steep enough or long enough to warrant taking the time to re-skin & de-skin.
Remarkably, to me, is that I'm the only one mentioning release bindings. Does everyone else think they have ACLs and MCLs made of Kevlar cable?
Via Con Dios if you have only fixed toe bindings.

