Labels by Sign and Label Printer
Social Distancing Floor Marking
PaintStripe Floor Marking Stencils
Drinking Fountain Safety Cover
Valve Lockouts & Hose Lockouts
Safety and Facility Signs and Labels Software
Wire and Component Label Software
Product Identification Label Software
Lockout Tagout Procedures and Tags
SmartID Aerospace RFID Solutions
- COVID-19 Signs
- Confined Space Signs
- Construction Site Signs
- Electrical and Arc Flash Signs
- First Aid Signs
- Forklift and Warehouse Safety Signs
- Lockout Tagout Signs
- Machine Operation Signs
- Maintenance Signs
- Marine and IMO Signs
- Personal Protection (PPE) Signs
- Radiation and Laser Signs
- Safety Awareness and Compliance Signs
- Slip, Trip and Floor Obstacle Hazard Signs
- Blank Pipe Markers
- IIAR Ammonia Pipe Markers and Components
- Pipe Markers for Acids and Bases
- Pipe Markers for Air and Ducts
- Pipe Markers for Fire Systems
- Pipe Markers for Gases
- Pipe Markers for Maintenance and Operation
- Pipe Markers for Oil
- Pipe Markers for Other Liquids
- Pipe Markers for Steam
- Pipe Markers for Water
Pipe Marker Accessories & Mounting Brackets
Maintenance and Production Tags
Calculators and Assessment Tools
Product Finders and Data Sheets
How Do I Select a Marker Size?
Wire Gauge Chart
Brady offers a variety of marker sizes for your wire marking needs. Please view the charts listed below to assist you in choosing the minimum recommended label height for your specific type of wire or cable
that you are identifying.
Type THW Wire O.D.
| Size AWG. |
O.D. mm (inch) |
Circumference mm (inch) |
Minimum Recommended Label Height mm (inch) |
| 18 | 2.74 (0.108) | 8.64 (0.34) | 12.70 (0.500) |
| 16 | 3.00 (0.118) | 9.42 (0.37) | 12.70 (0.500) |
| 14 | 4.11 (0.162) | 12.91 (0.51) | 19.05 (0.750) |
| 12 | 4.55 (0.179) | 14.29 (0.56) | 25.40 (1.000) |
| 10 | 5.05 (0.199) | 15.86 (0.63) | 25.40 (1.000) |
| 8 | 7.01 (0.276) | 22.01 (0.87) | 38.10 (1.500) |
| 6 | 8.20 (0.323) | 25.75 (1.02) | 38.10 (1.500) |
| 4 | 9.45 (0.372) | 29.67 (1.17) | 44.45 (1.750) |
| 3 | 10.19 (0.401) | 32.00 (1.26) | 50.80 (2.000) |
| 2 | 11.00 (0.433) | 34.54 (1.36) | 50.80 (2.000) |
| 1 | 12.90 (0.508) | 40.51 (1.60) | 63.50 (2.500) |
| 1/0 | 13.95 (0.549) | 43.80 (1.72) | 63.50 (2.500) |
| 2/0 | 15.11 (0.595) | 47.45 (1.87) | 76.20 (3.000) |
| 3/0 | 16.43 (0.647) | 51.59 (2.03) | 76.20 (3.000) |
| 4/0 | 17.91 (0.705) | 56.24 (2.21) | 88.90 (3.500) |
Type THHN Wire O.D.
| Size AWG. |
O.D. mm (inch) |
Circumference mm (inch) |
Label Height mm (inch) |
| 18 | 2.26 (0.089) | 7.10 (0.28) | 12.70 (0.500) |
| 16 | 2.54 (0.100) | 7.98 (0.31) | 12.70 (0.500) |
| 14 | 2.67 (0.105) | 8.38 (0.33) | 12.70 (0.500) |
| 12 | 3.10 (0.122) | 9.73 (0.38) | 12.70 (0.500) |
| 10 | 3.89 (0.153) | 12.21 (0.48) | 19.05 (0.750) |
| 8 | 5.54 (0.218) | 17.40 (0.68) | 25.40 (1.000) |
| 6 | 6.53 (0.257) | 20.50 (0.81) | 31.75 (1.250) |
| 4 | 8.33 (0.328) | 26.16 (1.03) | 38.10 (1.500) |
| 3 | 9.04 (0.356) | 28.39 (1.12) | 44.45 (1.750) |
| 2 | 9.86 (0.388) | 30.96 (1.22) | 50.80 (2.000) |
| 1 | 11.43 (0.450) | 35.89 (1.41) | 57.15 (2.250) |
| 1/0 | 12.47 (0.491) | 36.16 (1.54) | 63.50 (2.500) |
| 2/0 | 13.64 (0.537) | 42.83 (1.69) | 63.50 (2.500) |
| 3/0 | 14.94 (0.588) | 46.91 (1.85) | 69.85 (2.750) |
| 4/0 | 16.41 (0.646) | 51.53 (2.03) | 76.20 (3.000) |
Type PVC Wire O.D.
| Size AWG. |
O.D. mm (inch) |
Circumference mm (inch) |
Minimum Recommended Label Height mm (inch) |
| 22 | 1.57 (0.062) | 4.93 (0.19) | 7.62 (0.300) |
| 20 | 1.75 (0.069) | 5.50 (0.22) | 7.62 (0.300) |
| 18 | 2.00 (0.079) | 6.28 (0.25) | 12.70 (0.500) |
| 16 | 2.34 (0.092) | 7.53 (0.29) | 12.70 (0.500) |
| 14 | 3.50 (0.138) | 10.99 (0.43) | 19.05 (0.750) |
| 12 | 4.01 (0.158) | 12.59 (0.50) | 19.05 (0.750) |
| 10 | 4.65 (0.183) | 14.60 (0.57) | 25.40 (1.000) |
| 8 | 6.35 (0.250) | 19.94 (0.79) | 31.75 (1.250) |
Type Teflon Wire O.D.
| Size AWG. |
O.D. mm (inch) |
Circumference mm (inch) |
Minimum Recommended Label Height mm (inch) |
| 22 | 1.52 (0.060) | 4.77 (0.19) | 7.62 (0.300) |
| 20 | 1.73 (0.068) | 5.43 (0.21) | 7.62 (0.300) |
| 18 | 2.01 (0.079) | 6.31 (0.25) | 12.70 (0.500) |
| 16 | 2.26 (0.089) | 7.10 (0.28) | 12.70 (0.500) |