All Pompon&Pets accessories are handmade and made in France. This harness is Y-shaped. This shape allows for shoulder clearance and therefore does not hinder the dog while walking. This harness is waterproof and easy to clean! It is made with Biothane® and brass hardware, making it ultra-resistant. Size guide: Size S (band width: 2 cm): Neck circumference: 30 - 42 cm Chest circumference: 36 - 52 cm : Pug, Jack Russell, Spitz, Dachshund, Yorkshire ... Size M (band width: 2.5 cm): Neck circumference: 40 - 52 cm Chest circumference: 46 - 70 cm : Beagle, Shiba Inu, French Bulldog, Staffy, Cocker ... Size L (band width: 2.5 cm): Neck circumference: 46 - 68 cm Chest circumference: 58 - 90 cm : Golden Retriever, Husky, Staff, English Bulldog, Australian Shepherd, Doberman, Dalmatian, Boxer ...