Size:<br />S:Width: 2.5cm/0.98inch (The Adjustable Range: 30-40cm/11.81-15.75inch)， it can be cut by the demands if it is under 30cm/11.81inch.<br />M: Width: 2.5cm/0.98inch (The Adjustable Range: 38-50cm/14.96-19.69inch)， it can be cut by the demands if it is under 50cm/19.69inch.<br />L: Width: 2.5cm/0.98inch (The Adjustable Range: 48-60cm/18.9-23.62inch)， it can be cut by the demands if it is under 60cm/23.62inch.<br />XL: Width: 2.5cm/0.98inch (The Adjustable Range: 52-68cm/20.47-26.77inch)， it can be cut by the demands if it is under 70cm/27.55inch.<br /><br />Package Include: 1 x Dog Neck Strap<br /><br />Highly visible LED light glows and flashes in darkness<br />With switch control to turn on the LED and change its modes<br />Easy to wear and remove<br />Adjustable collar design