Use the USA Delphi Terminals Cable Gauge Identification Reference when available. Look at the backside of the insulation crimp and read the cable size that the terminal is designed for.

| Terminal | Gauge Size MM2 | Gauge Size AWG |
|---|---|---|
| 21 | 0.35 & 0.50 | 22 & 20 |
| 19 | 0.50 & 0.85 | 20 & 18 |
| 15 | 1.00 & 2.00 | 14 & 16 |
| 13 | 2.00 & 3.00 | 14 & 12 |