Durable polyethylene plastic baseballs. Holed design restricts flight and distance. Use indoors or outside! Perfect for PE class, team practices, and backyard games. You can even use them as an oversized pickleball for beginners! Softball sized balls have a 3.62” (92mm) diameter and weigh about 1.3 ounces (36 grams) each. These balls have a 11.4” circumference, so they are about half way between real softball that have either an 11” or 12” circumference.