String gauges, scale length and pitch ranges in Hertz for Niibori guitars
Why are the strings on the bass instruments thicker than on the higher, treble instruments?
It's because thin strings would have to be very slack to vibrate slowly, and slack strings buzz even at quite modest volumes. Thicker strings can be really tight and still produce a low note, because they are heavier (harder to move) for the same tension, and so move more slowly without slapping. More here
String thickness depends on whether the strings are low, medium or high tension, but here are some typical values.
|Guitar||string material||pitch range
inches & mm
inches & millimetres
|Alto|| Top 3 strings are monofilament nylon.
Bottom 3 are wound
| 0.0235in to 0.036in
0.597mm to 0.914mm
|Prime|| Top 3 strings are monofilament.
Bottom 3 are wound.
|0.0285in to 0.044in
0.724mm to 1.118mm
|Bass|| Top 2 strings are monofilament.
Bottom 4 are wound.
|0.0327in to 0.056in
0.831mm to 1.422mm
|Contra|| Top 4 strings are wound.
Bottom 2 are double wound.
|0.030in to 0.098in
0.762mm to 2.489mm
(*) These are the pitches of the open strings to the nearest whole number - the note on fret 12 of the top string is twice as high again
There's more information in our string FAQ