Description: With LED light and bright color, it has three lighting modes and can be easily spotted. After buying this product, it is easy for you to wear and remove the dog necklace. And you can walk your dog easily. Made of high quality nylon material, it is durable to use. The size is S, M, L, XL. It is suitable for most dogs. Item Name: Neck Strap Material:Nylon Batteries: 2 x Button Batteries (Included) Size Details: [Our Size S] Length: 35cm - 43cm/13.78" - 16.93", Width: 2.5cm/0.98" (Approx.) [Our Size M] Length: 40cm - 48cm/15.75" - 18.90", Width: 2.5cm/0.98" (Approx.) [Our Size L] Length: 45cm - 52cm/17.72" - 20.47", Width: 2.5cm/0.98" (Approx.) [Our Size XL] Length: 52cm - 60cm/20.47" - 23.62", Width: 2.5cm/0.98" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X LED Pet Collar With LED light and bright color, it has three lighting modes and can be easily spotted. After buying this product, it is easy for you to wear and remove the dog necklace. And you can walk your dog easily. Made of high quality nylon material, it is durable to use. The size is S, M, L, XL. It is suitable for most dogs.