Advice on kids ski lengths

[Euler]

I have two kids 7 and 9 and I'm looking at what we and our friends have available for them to ski on this year. What's the general guideline for how long a young childs ski should be? Both of them are transitioning from wedging to parallel turns and ski most blue terrain at Mount Snow. They both also will ski easier groomed blacks like Fallen Timbers when conditions are ideal ( early in the day, few other skiers around, packed powder on the trail)

 

[SkiDork]

Up to the chin should be a pretty good length.

 

[tree_skier]

between chin and nose. I used to buy the past seasons lease skis around labor day before my kids got into racing. Could get virtually new gear at less then the lease price. then had stuff to hand down.