This is a beautiful item, purchased last month and used only a few times on weekends. The belt has been adjusted to a comfortable size for a person with a 16cm wrist (probably 16.5cm). No returns or exchanges are accepted to prevent swapping. Specifications below: Model/Product Number: T120.807.11.051.00 Movement: Automatic Power Reserve: Up to 80 hours Swiss Automatic Patented Nivachron™ balance spring Material: Case: 316L Stainless Steel Band: Stainless Steel Crystal: Sapphire Crystal Glass (Scratch-resistant, anti-reflective coating) Size: Case Diameter: 40mm Case Thickness: 12.5mm Band Width: 20mm Water Resistance: 30 bar (300 m/1000 ft) Weight: 148g Dial Color: Gray Other Features: Hours, minutes, seconds, date See-through case back Screw-down crown and case back Mineral bezel ring Case, dial, hands: Super-LumiNova Interchangeable quick-release bracelet Push-button safety folding clasp