Please note that Airtag is not included in the package. Product size: the adjustment range is 28-39 cm, 1.5 cm wide, adjustable collar design, this cat collar fits most cats or small pets. Premium Material: Our adjustable cat collars are made of material, well-fitted and durable for long time use, Airtag holder is made of soft silicone, your cat won’t get irritated when wearing on the neck.