Available in Cat, Kitten and Small Dog size options. The size menu lists the adjustable neck size/collar length range in inches. The standard width for this collar is 1/2". Choose your buckle type (removable or non-removable). The two standard plastic buckle types look the same as in the photo - but function differently. If you are unsure of the differences, see the Options tab (above). To upgrade your plastic buckle to a metal buckle, add the Metal Buckle Upgrade to your order. Choose your preferred hardware color (for the standard metal parts on the collar - i.e. the length adjuster, split ring or D-ring and included bell).