SizeXXS for adjustable length 5.9-8.3"(15-21cm), width 5/8"/1.5cm, length 9.8"/25cm;XS for adjustable length 7.9-10.2"(20-26cm), width 5/8"/1.5cm, length 11.8"/30cm;S for adjustable length 10.5-13"(27-33cm), width 5/8"/1.5cm, length 14.5"/37cm Adjustable safety bucklethese cute dog collars are designed with adjustable metal safety buckles, you can adjust them to fit your pet's neck, will not loose easily, and they are easy to put on and take off, provide your pet with a comfortable wearing experience. ComfortableCollars are mainly made of quality PU material, which are soft and breathable, will not hurt the pet's neck and skin, and can be applied for a long time. FASHION & STYLISH It's full studded by bling bling rhinestones.Funny and amazing pet neck accesorries for your adorable dogs. It'll help you gain tons of compliments from your friends,your neighbors or other passerby 30 DAYS WARRANTYWe have worked very hard to offer you the best product and we hope to meet your expectations. If you are not completely satisfied with your purchase, Please contact us immadiately, we will help you solve your problem and avoid your loss as much as possible.