Coastal Pet Products DCP36422SAP K9 Explorer 5/8-Inch Dog Collar, Extra Small, Blue K9 Explorer Reflective Adjustable Dog Collar. Total length: 12". Color: sapphire. Width: 5/8". Adjustable sizing to fit necks 7.5" to 11". The collar has many one-of-a-kind features, including a side-release buckle, movable D-ring and reflective stitching. Features a reflective stitching woven into luxurious nylon for night time safety. This collar is comfortable, appealing and durable. Great for everyday use.