We’ve looked at several larger sports stores, and we haven’t found a core ball similar to the one we sell in our online shop. They are either too heavy or not squishy enough. The barre3 Core Ball is about 10 inches when inflated. It’s lightweight, and it’s pretty soft. It’s the perfect prop to shape the inner thighs and strengthen your core while protecting the low back. We ship everywhere—even internationally. If you don’t want to purchase a barre3 Core Ball, we recommend scrunching up a towel and using that as a substitute.