I'm unsure at this point, but leaning toward 17". My main reason is when they are packed down, they are still 27" and packability is my main reason for switching from full length lone wolf sticks. Any longer step to step and they will be just as long as my LW when packed. The difference between 17" and 20" over four sticks is only a foot in climbing height. I think I can easily make up for that by spacing my sticks further apart up the tree, including a branch to step on during my climb or using aiders.