Details: XS: 30*1.0cm (length * width); adjustable range 15-30cm
S: 40x2.0cm (length * width); adjusting range 30-40cm
M: 50x2.5cm (length * width); adjusting range 36-50cm
L: 60x3.0cm (length * width); adjustable range 40-60cm
[ SIZE ] We have collars in multiple sizes; We highly recommend measuring your dog to ensure an accurate fit. Measure your dog's neck before purchase; using a soft measuring tape or piece of string. You can also measure your dog's old collar. Only measure one side of the buckle. [ PACKAGE INCLUDES ] 1 adjustable collar; 1 matching bow tie. [ SUPER CUTE AND DURABLE ] : Made of purified cotton fabric. It's comfortable on your dog. Cute design underlines the uniqueness of your dog. Meanwhile; the extra thick strong cotton webbing on the inside; which imparts durability to the collar and leash. We do a box stitch at all of the stress points for added strength. Collars; bow ties & leashes can be hand washed; then lay flat to dry. [ STRONG STEELING HARDWARE ] : Using rose gold tone D-ring and buckle . All the collars are adjustable with a slider. [ QUALITY GUARANTEE ] : Items can be returned if unmet your requirement. Please contact me if you have any problems with your order.