Thank you for viewing. Size: S Harness: Neck circumference approximately 40-49cm Chest circumference approximately 46-59cm, approximately 60g Lead: Length approximately 150cm x Width approximately 1.5cm, approximately 40g The length can be adjusted on both the neck and chest sides. It's made of breathable and elastic fabric with reflective material, so it's safe at night. The matching lead also has a cushioned handle. I only tried it on once, so please refrain from purchasing if you are concerned. *There is also a blue version (photo 8) of the same product and size, so please inquire if you are interested. Thank you very much.