String gouge?

[Oberg]

Hello, i need to buy new strings, but i don´t know what size i have on my 5 stringer now, i only know that the B string is a 130, do i need new strings that have exactly the same size as my current ones?

ex.
40-130 or something likewise!

[lemur821]

No, they can be a little different. If you get some that are you big your nut will need to be filed out to prevent cracking, and if they're too small it's possible that open notes will rattle. If you just get a set with a .130 B they should be plenty close.

[Dan Molina]

pretty much whatever set you get will be perfectly fine. Also, the thicker the gauge the tighter the string,