When sourcing chain link fabric, you must prioritize wire gauge (thickness) and mesh size. For industrial applications, a 9-gauge wire is standard, while 11 or 12-gauge is suitable for residential use. The mesh size, typically 2 inches (50mm), determines the security level; smaller apertures like 1 inch are used for high-security 'anti-climb' requirements. Ensure the selvage type (knuckled vs. twisted) matches your safety needs—knuckled edges are safer for public areas, while twisted (barbed) edges enhance security.