Yep--what Floxter said. AMO standard just don' t work with every bow--I' ve made strings for longbows that were 2" shorter than the AMO bow length and I used to own an old Herter' s recurve that stated right on the bow that it got a string 6" shorter than the AMO bow length. It will vary with the bow design and shooter' s preferance. The easiest way to find out, or at least get close, it to make a " string" from some nylon twine (the type used for trotlines works fine). Shorten or lengthen until you get the brace height you desire, then measure it--then you will know what length string to get.

Chad