Height Recommended Ski Length
 
5'0" to 5'2" 135cm
5'3" to 5'5" 145cm
5'6" to 5'8" 155cm
5'9" to 5'11" 165cm
6'0" to 6'2" 170+cm
6'3" + 180cm
 
Keep in mind these are recommendations.  If you are comfortable with a certain length, by all means stick with it.