Any idea what brand it is, how old it is, etc.? A lot of the older recurves get a string 4" shorter, but AMO specs state 3" shorter, and some bows don't follow either rule. For instance, an old Herter's I had got a string 6" shorter.

You can measure the AMO bow length to get an idea--use a cloth tape, start at the string groove (not the tip). Measure along the side of the limb, following the countour, through the center of the riser, along the other limb to the other string groove. That will give you your AMO bow length.

If you don't know the make or age, dacron (B-50 or B-500) is the safe bet. I'd use 12 or 14 strands. Endless or flemish will work fine. These are the way strings are made--either one can be made with any string material.

Chad