This ball comes in three sizes.  I have the size 4 which is super-cheap right now at under five bucks as an add-on item.  You really cant beat the price for such a ball.  Its really a nothing fancy ball, but again. . . for the price. . thats fine.  Just make sure you purchase the right size for your child.  A size 4 is for ages 8  12-years.  So far, this ball has held air without a problem.  It comes inflated.