Size Conversion

Button sizes are measured in Lignes (”’). Here are equivalent size in mm.
14"' = 9mm 16"' = 10mm 18"' = 11mm 20"' = 12.5mm
22"' = 14mm 24"' = 15mm 26"' = 16.5mm 28"' = 18mm
30"' = 19mm 32"' = 20.5mm 36"' = 20.5mm 40"' = 25.5mm
44"' = 28mm 50"' = 34mm 60"' = 38mm 70"' = 44mm