From the manufacturer:
PULLER Dog Fitness Tool
7" size (2 Rings) - For small breeds
8" size (2 Rings) - For small & medium breeds
11" size (2 Rings) - For medium & large breeds
12" size (Single Ring) - For large breeds & Giant breeds
From the manufacturer:
PULLER is an innovative dog fitness tool, designed by professional dog experts. Exercises with PULLER (Running, Jumping, Pulling) provide a daily fitness workout and guarantee special experience for dog owners in building bond with their pets.
20 minute training with PULLER = 5 km/3 mi running.
PULLER is represented by five different sizes. Therefore, each owner can choose the most suitable size of PULLER for every dog breed.