Diameter: 2 cm (0.8″) for sizes XS/S and 2.5 cm (1″) for sizes M/L

Neck size: from 17.3″ to 20.9″ | Belly size: from 28.7″ to 48″ | Chest strap: from 9.4″ to 12.6″ | Suitable for large-sized dogs