Diva Dog's Carlyle leather dog collars are elegantly designed with a timeless color palette. This uptown look won't be found on the "What's Not" list next season. Made of soft & supple fine leather with the highest quality metal hardware. In 3 classic colors and 4 adjustable sizes: Extra Small - 3/8" x 8-10" • Small - 1/2" x 11-14" • Medium - 1" x 15-18" • Large - 1" x 17-22" NOTE: The lengths listed are the approx. location of the holes on the strap. These collars can be adjusted to smaller lengths simply by adding more holes. You can lengthen them as well, up to 1 additional inch - the last hole is approx. 1" to 1-1/2" from the end.