| MM | Approximate Size In Inches |
|---|---|
| 1mm | 1/32 Inch |
| 2mm | 1/16 Inch |
| 3mm | 3/32 Inch |
| 4mm | 1/8 Inch |
| 5mm | 3/16 Inch |
| 6mm | Just under 1/4 Inch |
| 7mm | Just over 1/4 Inch |
| 8mm | 5/16 Inch |
| 9mm | Just under 3/8 Inch |
| 10mm | Just over 3/8 Inch |
| 11mm | 7/16 Inch |
| 12mm | Just under 1/2 Inch |
| 13mm | Just over 1/2 Inch |
| 14mm | 9/16 Inch |
| 15mm | Just under 5/8 Inch |
| 16mm | 5/8 Inch |
| 17mm | Just under 11/16 Inch |
| 18mm | Just under 3/4 Inch |
| 19mm | Just over 3/4 Inch |
| 20mm | Just under 13/16 Inch |
| 21mm | Just over 13/16 Inch |
| 22mm | Just under 7/8 Inch |
| 23mm | Just over 7/8 Inch |
| 24mm | 15/16 Inch |
| 25mm | 1 Inch |