Approximate millimeter to inch conversion chart
| 2MM=.08" | 5MM=.2" | 10MM=.4" | 16MM=.64" | 25MM=1" | 38MM=1.52" |
| 3MM=.12" | 6MM=.24" | 12MM=.48" | 18MM=.72" | 28MM=1.12" | 40MM=1.6" |
| 3 1/2MM=.14" | 7MM=.28" | 13MM=.51" | 20MM=.8" | 30MM=1.2" | 44MM=1.76" |
| 4MM=.16" | 8MM=.32" | 14MM=.56" | 22MM=.88" | 32MM=1.28" | |
| 4 1/2MM=.18" | 9MM=.36" | 15MM=.6" | 24MM=.96" | 36MM=1.44" |