Blueberry Pet Pack of 2 Collars for Dogs, Neck 12"-16", Sunny and Starry Small Dog Collar Neck 12-16", Width 5/8", Size Small; The collar does not stretch itself, please make sure leave only 2 fingers between collar and dog neck. Made of fluorescent silkscreen on the ribbon to create a glowing effect at night time Those buckles are made from ecofriendly plastic. The metal D ring is chrome coated to add durability. This collar is a single product. However, it comes with matching leash to complete the look. Leash sold separately Picture was taken from a size Medium (Width 3/4", Neck 14.5-20"