Both Lola and JD, love these little rubber dog toys. About 2" in diameter, they're hollow with a little bell inside that send the dogs into a frenzy when a new one arrives in the house. JD, which could well stand for "Just Destroy" will usually crush the bell within hours then set about enlarging the hole until the dead bell falls out. This one though has lasted a full week before being de-belled. Something of a record!