I had the same problem with a string-through four-string. I ended up using these:

Ernie Ball, Super Long Scale* 38.25 or 38.5

I like them reasonably well and they are decently priced. Still, one night I tried to figure out what other strings might fit. Sorry that all lengths are in inches. Here's what I found based on published lengths

DR, Extra Long Scale 40.7

Fodera, Extra Long Scale 39.25

Ken Smith Extra Long 40

Rotosound, Extra Long 39

Sadowsky, Extra Long 39

Thomastik-Infeld, Super Long 39.75


*** 38” Strings:

D’Addario, Super Long

DR, Long

Elixir, Extra Long

GHS, Long Plus

Ken Smith, Long

La Bella, Extra Long

SIT,* Extra Long

Spector, Long



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