First of all I would just call or email Donnie and have him walk you through it, super helpful dude. But that length measurement is a measurement of distance between straps. What that needs to be depends on what bow(s) you're putting it on. You need it to be long enough to clear your grip and sight window and give good stability but short enough that you're not into the working part of the limb. Donnie will have good advice on what length to order, especially if you want to be able to use it with multiple bows.I'm brand new to archery and have been looking at the creekwalker quivers. There's a length option and I'm not sure how to measure it to fit my bow. I like the creekwalkers 1 piece design, are they the only ones who do that?