5gauge (GA) =  5.26mm               

    6 ga =0.192''=4.87mm                   

    7 ga =4.5mm                            

    8ga =4.11mm                             

    9ga =0.148''=3.75mm

    10 ga = 3.43mm

　　11 ga=0.120''=3.05mm

　　11 1/2''=0.113' =2.87mm

　　12ga =0.106'' =2.69mm

　　121/2'' =0.099 =2.51mm

　　13ga=2.34mm

　　14ga = 2.03mm

　　15ga = 1.85mm

　　16 ga = 1.65mm 

　　18 ga = 0.041'' = 1.19mm

    19 ga =0.035'' =0.889mm

    20ga = 0.032'' = 0.8128mm