Blue Pet Puppy Dog Rivet Spiked Studded Neck Strap Buckle Collar Adjustable XS Color: Blue Dimension: 1.5 x 30 cm, 0.59" x 11.8" Fit neck size: 19cm/7.5"- 25cm/9.8" Min. diameter: about 6.5cm / 2.56" Max. diameter: about 9cm / 3.5"