Features: Genuine leather for durability and long-lasting use. Martingale design for safe, no-slip control. Wide collar for added comfort and pressure distribution. Heavy-duty metal chain and hardware. Stylish studded design for a bold look. Suitable for training and everyday walks. Sizing: Small: 30-36cm (width: 2.8cm) Medium: 31-39cm (width: 3.0cm) Large: 36-44cm (width: 3.5cm)