I also have other pet supplies for sale. #Nenechi's Collar is here. It has adjustable belt holes with 5 levels. The tips of the studs are not sharp, so they will not hurt your dog. Item Name: Studded Collar Set Contents: 1 piece Color/Pattern: Blue Weight: Approximately 85g Material: PU Leather Country of Origin: China Size: M (Neck circumference approximately 29-36cm, width 2.5cm) *Please be sure to measure your pet's size and compare it with the above size. *Please note that there may be some errors depending on the type of pet and how it is measured. pe001-bl-m