Devices and methods for measuring musical instrument strings

An instrument string gauge, comprising:

• a holder;
• a first width gauge located at a first location on the holder, the first width gauge including first slots and first cavities arranged around a perimeter of the first width gauge, the first slots configured to receive a string of a musical instrument, and the first cavities configured to enable corresponding adjacent first slots to engage the string while limiting contact between the first width gauge and another string adjacent to the string;
• and
• a second width gauge located at a second location on the holder different from the first location,
• the second width gauge including second slots and second cavities arranged around a perimeter of the second width gauge, the second slots configured to receive the string of the musical instrument, and the second cavities configured to enable corresponding adjacent second slots to engage the string while limiting contact between the second width gauge and another string adjacent to the string.