Now your furry friend can rock your favorite brewery! Small, Medium, and large collars available. Small collars have plastic buckles. Large and medium collars have buckle closure and bottle opener. X-Small= (thinner collar without rubber and bottle opener) 6"-12" (15-30cm)- Great for DachshundSmall= (plastic buckle without bottle opener) 6"-12" (15-30cm)- Great for Pugs and Boston TerriersMedium= 12"-21" (30-53cm) Great for a Border CollieLarge= 17"-27" (43-69cm) Great for Labs and Boxers