Originally Posted by TennisCJC
Mikeler's site is excellent as it includes recommended main and cross string lengths. I have found that you can usually go 1 foot shorter than the Klipper site recommends - if they say 20'x19' (M&C), you can usually go 19'x18'. I would use there recommendation the first time, then adjust down a foot if you have extra length.
On stretchy strings like multifilaments, I have also found this to be the case. With polys, I'd stick to the Klipper numbers.