| Standard Inside Coil Diameters | |||||||||||
| Inch | .010 | .013 | .015 | .018 | .020 | .025 | .030 | .035 | .040 | .045 | .050 |
| .mm | .254 | .33 | .38 | .45 | .51 | .64 | .76 | .89 | 1.0 | 1.14 | 1.27 |
|
#50 | #50 | #50 | #50 | #48 | #47 | #44 | #42 | #42 | #42 | #40 |
| #48 | #48 | #48 | #48 | #47 | #46 | #42 | #40 | #40 | #40 | #38 | |
| #47 | #47 | #47 | #47 | #46 | #44 | #40 | #38 | #38 | #38 | #36 | |
| #46 | #46 | #46 | #46 | #44 | #42 | #38 | #36 | #36 | #36 | #34 | |
| #44 | #44 | #44 | #44 | #42 | #40 | #36 | #34 | #34 | #34 | #32 | |
| #42 | #42 | #40 | #38 | #34 | #32 | #32 | #32 | #30 | |||
| #40 | #40 | #38 | #36 | #32 | #30 | #30 | #28 | ||||
| #38 | #38 | #36 | |||||||||
| #36 | #36 | ||||||||||