These blank white balls measure 37mm (or 38mm depending on stock).  They can easily be imprinted, however we don't currently offer that service.  They are built from 2 halves, unlike injection blown balls, making them stronger & more durable.  They do have a small seam which means they can't be used for championship play, but makes them perfect for beer pong (and also makes them super cheap).

Buy just 1 single ball, or buy ping pongs by the gross.