This is one of my favorite pellet treat balls. This rubber ball is absolutely perfect for dropping pellets out as well as for teething. Pigs will get several sets of baby teeth so they are always teething. I find this rubber ball to be very well made and seems to be indestructible. Circumference is 16". Please check out my other pig items. I add new items weekly. Type AZ Micro Mini Pigs in the Amazon search bar. You might find a few items you like that I can ship together. Free shipping/Prime with all my items.