This table shows the most common sizes of RadioShack plugs based on the color of the ring at the end of the plug. This list is intended as a guideline only and is subject to change without notice. It may not include all RadioShack adaptaplugs, particularly older plugs.
| Plug Color | O.D. | I.D. |
| Black | 5.5 mm | 1.83 mm |
| 5.5 mm | 3.85 mm | |
| Submini | 2.5 mm | |
| Mini | 3.5 mm | |
| Gray | 5.5 mm | 1.5 mm |
| White | 5.5 mm | 2.5 mm |
| Red | 5.0 mm | 1.5 mm |
| Pink | 3.8 mm | 1.1 mm |
| Brown | 5.5 mm | 2.8 mm |
| Orange | 3.4 mm | 1.3 mm |
| Yellow | 6.5 mm | 4.3 mm with 1.4 mm pin |
| 5.5 mm | 3.3 mm with 0.9 mm pin | |
| 4.7 mm | 1.7 mm | |
| 4.0 mm | 1.7 mm | |
| 3.9 mm | 1.7 mm | |
| 2.3 mm | 0.7 mm | |
| Light Yellow | 6.5 mm | 4.1 / 3.1 mm with 1.0 mm pin |
| Beige | 3.0 mm | 1.0 mm |
| Yellow-Green | 6.3 mm | 3.0 mm |
| Dark Green | 5.0 mm | 2.5 mm |
| Turquoise | 3.0 mm | 1.1 mm |
| Light Blue | 6.9 mm | 0.71 mm |
| Navy Blue | 5.5 mm | 2.1 mm |
| Magenta | 3.8 mm | 1.4 mm |
| Purple | 5.0 mm | 2.1 mm |