This is a standardized international belt sizing conversion chart for men's trousers, providing precise measurements across multiple sizing systems: Chinese waist sizes (22-42 inches), US/UK waist sizes (1尺6–3尺5), metric waist circumference (49–125 cm), European sizes (70–110), and length codes (A–7) corresponding to belt lengths in centimeters (85–125 cm). The chart serves as a practical reference tool for consumers and retailers to ensure accurate belt fitting based on trouser waist measurements. Designed for clarity and usability, it features a clean tabular layout with color-coded length代号 (A–7) for quick visual identification—red letters indicate the length code field where users can specify required belt length. Ideal for e-commerce product listings, tailoring services, or retail inventory management. The chart supports unisex application but is primarily calibrated for adult male trouser sizing; women may use it with adjusted waist measurements. No branding, logos, or decorative elements—purely functional, measurement-focused utility item.