Our dog collars are fully adjustable. They are made of machine washable cotton fabric with a nylon core except for small collars. Small collars are made of machine washable cotton fabric with an interfacing core. Interfacing is a fabric stabilizer that gives the collar stability and form. Collars feature a nickel plated d-ring, plastic triglide and a plastic side release buckle. Each collar is handmade to order. Please note: Our collars are not approved as tie out collars and are not recommended for excessive pullers. We do offer a variety of buckle sizes. Please refer to chart below: Small adjusts from 7-10” (Available Buckle Size - 5/8”) Medium adjusts from 10-14” (Available Buckle Sizes - 3/4” & 1”) Large adjusts from 13-18” (Available Buckle Sizes - 1” & 1.5”) XLarge adjusts from 16-23” (Available Buckle Sizes - 1” & 1.5”) XXLarge adjusts from 21-29” (Available Buckle Sizes - 1” & 1.5”) Custom sizing is available upon request! ** Collar Lengths with available buckle widths. Buckle width indicates the width of the collar. Leashes are typically available in 4, 5 or 6 ft . They are constructed of 1” wide nylon and wrapped with quilt cotton. The closure is a nickel plated snap hook. Care: Machine wash + line dry. Do not soak.