When sourcing wire fence mesh, you must prioritize wire gauge (thickness) and mesh aperture (opening size). For heavy-duty security or livestock, a lower gauge number (thicker wire) like 12.5 gauge or 9 gauge is essential. Additionally, the tensile strength should be verified; high-tensile wire is preferred for long-span fencing as it resists stretching and impact better than low-carbon steel. Ensure the welding point strength or knot type (such as fixed knot or hinge joint) aligns with the intended pressure the fence will face.