Size XS: neck 20-26cm, width 1.5cm, suggested up to 5kg
Size S: neck 24-32cm, width 1.8cm, suggested 5-12kg
Size M: neck 32-46cm, width 2.4cm, suggested 12-20kg
Size L: neck 41-53cm, width 2.8cm, suggested 20-35kg
Size XL: neck 45-57cm, width 3.5cm, suggested 35-50kg
Size XXL: neck 56-66cm, width 3.8cm, suggested 50kg and over
Measure the widest part of the neck, around the middle where the collar sits, and choose the size your measurement sits inside, ideally near the middle. Measurements are taken by hand, and a difference of 1 to 2cm is normal. Weight is a guide only; always go by the neck measurement. The ranges overlap, so if your dog fits two sizes, the larger gives a wider band. Once buckled, two fingers should slide flat between the collar and the neck. New leather is firm at first and softens with wear.