In reply to alexm198: Hi Alex,
Yes, short and light is best. Sub 160 length is best if you're going to be carrying them on routes (so they don't poke up too high on your pack, restrict axe swinging etc). You'll have loads of ankle flex so it takes some getting used to, to not get thrown way in to the backseat, especially with a heavy climbing pack. Beats snow shoes though!
I have some old Hagan approach skis and silvretta 404s you can have for €50 if you're around Chamonix.
Cheers and happy approaching!