2 kinds of therapy balls for different functionality. Ball with longer nibs is great for small muscles including feet, hands and small areas that needs perking up. Bigger size ball with stubby nibs is for large muscles.

• Product size - 3.8" W x 3.8" W x 6" H
• 3.5" Large ball for major muscles
• 2.5" Smaller ball for minor muscles and tendons
• Sensory spikes that act as mini accupressure points
• Provides a kneading effect resulting in deep muscle release
• Helps to enhance blood flow and promote healing of affected area
• Small ball spikes are long and soft penetrating points
• PVC
• Wipe clean
• Imported