Nuts are identified with dots:

1 dot = gauge 9-42 to 9-46
🎸 9–42 (Extra Light)
1st (E): .009
2nd (B): .011
3rd (G): .016
4th (D): .024
5th (A): .032
6th (E): .042

🎸 9–46 (Hybrid Light Top / Heavy Bottom)
1st (E): .009
2nd (B): .011
3rd (G): .016
4th (D): .026
5th (A): .036
6th (E): .046

2 dots = gauge 10-52
🎸 10–52 (Hybrid Regular / Heavy Bottom)
1st (E): .010
2nd (B): .013
3rd (G): .017
4th (D): .030
5th (A): .042
6th (E): .052

3 dots = gauge 12-56
🎸 12–56 (Heavy or Jazz)
1st (E): .012
2nd (B): .016
3rd (G): .024
4th (D): .032
5th (A): .044
6th (E): .056