When selecting a clothing factory, you must assess their production scale and machinery. Look for factories equipped with automated cutting machines and specialized sewing lines (e.g., overlock, flatlock, or bartack) to ensure consistency. Verify if they offer OEM (Original Equipment Manufacturer) or ODM (Original Design Manufacturer) services. A professional factory should provide CAD pattern-making services and have a monthly output capacity that aligns with your scaling needs, typically ranging from 5,000 to 50,000 pieces per month for medium-sized operations.