Dog collar. Air cushion padding containing thousands of tiny air bubbles providing a comfortable cushion effect. Buckle fastening. D-ring attachment for leads. Fabric: Nylon. Size: Size 4 - 9mm x 35-43cm, Size 5 - 25mm x 39-48cm, Size 6 - 25mm x 45-54cm, Size 7 - 25mm x 50-59cm, Size 8 - 25mm x 55-63cm.