L——lignes（号）用于表示纽扣规格1Lignes= 0.625 MM1MM=1/25 INCH
纽扣的量度方法是直量圆形纽扣的最大直径.以下是纽扣规格量度对照表
12L=7.5 MM =5/16\"13L=8.0 MM =5/16\"14L=9.0 MM =11/32\"15L=9.5 MM =3/8\"16L=10.0 MM =13/32\"17L=10.5 MM =7/16\"18L=11.5 MM =15/32\"20L=12.5 MM =1/2\"22L=14.0 MM =9/16\"24L=15.0 MM =5/8\"26L=16.0 MM =21/32\"28L=18.0 MM =23/32\"30L=19.0 MM =3/4\"32L=20.0 MM =13/16\"34L=21.0 MM =27/32\"
36L=23.0 MM =7/8\" 40L=25.0 MM =1\"44L=28.0 MM =1-3/32\"45L=30.0 MM =1-3/16\"54L=34.0 MM =1-5/16\"60L=38.0 MM =1-1/2\"64L=40.0 MM =1-9/16\"
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