height :165cm(5' 4.9")
after trying different lengths in the past:
max distance sling length: 90cm (feels light and that it should go faster but my arm has already reached its top speed,its like sling is using 70% of arm power )
prefered sling length: 62cm (throw feels smooth,its like sling is using 99% of arm power)
minimal sling length: 50cm (feels awkward,its like sling is using 50% of arm power)
but i started to believe that there is no ideal length for height but you feel the best with what you are used to or what you sling all the time with ,if you are talking about 40-110cm.
so if i had to choose between my arm and a 40cm sling i would choose my arm , its much more accurate and faster to reload