text: the factors for choosing the right ski instruments? which factors should i consider whwn i'm byuing a new set of ski instrument? your height, your weight,shoe size, and your experience level.  your height determines how long your skis should be, your weight determines how strong of an arch the ski has, your shoe size determines your ski boot size, and your experience level determines whether or not to use ski poles, you should get those when you gain experience.