Our poles are about 5 feet 11 inches or 6 feet long.  We’ve found this length works best for most people.  Typically, the shorter you can keep your poles, the better control you’ll have.  The poles need to be long enough to prevent your skies from hitting the front of your sled.  The best length is measured from your waist to the back of your rear ski during a stride, plus 4-8 inches.  Those who will snowshoe instead of ski can get by with even shorter poles.