... etc.6.Logo: laser engraved embossed or debossed.7.Usaging: used for men's or women's garment ... size of button size:We often say that the 14 #, 16 #, 18 #, 20 #, 60 #, etc.3)The standard formula: ... 0.625mm 1mm = 1 / 25" , (INCH) 12L = 7.5MM = 5 / 16 ", 13L = 8MM = 5 / 16" , 14L = 9MM = 11/32 ", 15L = 9.5MM ... 3 / 8", 16L = 10MM = 13/32 ", 17L = 10.5MM = 7 / 16", 18L = 11.5MM = 15/32 ", 20L = 12.5MM = 1 / ...