Because they are a natural product they can vary largely in size, but most cuttlefish bones are between 7-10cm (3-5”)in length. Cuttlefish bone is not actually a 'bone' at all, but rather the hard inner shell of a cuttlefish, which is a type of sea mollusc.
This product would be ideal for bird owners who keep birds like capuchin, conure, or tropic birds in captivity.
