เบอร์ SWG    เส้นผ่าศูนย์กลาง 
# 8               4.064 mm
# 9               3.658 mm
# 10             3.251  mm
# 11              2.946 mm
# 12             2.642 mm
# 14             2.032 mm
# 16             1.626 mm
# 18              1.219 mm
# 19              1.016 mm
# 20             0.914 mm
# 21              0.813 mm
# 22             0.711 mm
# 23             0.609 mm
# 24             0.558 mm
# 26             0.457 mm