All Pompon&Pets accessories are handmade and made in France. This collar is waterproof and easy to clean! It is made with Biothane® and brass hardware, making it ultra-resistant. Size guide: Clip collar: Small (width 2 cm): From 28 to 42 cm Medium (width 2.5 cm): From 38 to 52 cm Large (width 2.5 cm): From 48 to 62 cm Eyelet collar: Small (width 2 cm): From 29 to 39 cm Medium (width 2.5 cm): From 37 to 49 cm Large (width 2.5 cm): From 45 to 57 cm