An enail is measured by the ID (inner diameter) of the coil. This coil ID will match the OD (outside diameter) of the banner that it works with.
How do you know what size enail you have and what size banger you have here with things around the house? We will attempt to help you with that here.
| Coil Size | Banger Size | Household Measuring Device |
| 14mm | 14mm | This can this find with a dime. It is about 14mm from the tip of FDR’s nose to the back edge of the dime. |
| 16mm | 16mm | This can be found as the inner ring of a dime. |
| 20mm | 20mm | This can be measured from just on the inside of a nickel. |
| 24mm | 24mm | A quarter is just a tiny hair larger than 24mm, so it is a good choice to use this for 24mm |
| 25mm | 25mm | A quarter will just fit into any 25mm space with just a little room on each side. |
Coil Size