Pesp Pet Dog Metal Buckle 2-rows Army - Nylon Fabric Belt Strap Adjustable Collar With double buckle and plated D-rings designed, for secure leash attachment. Double thick designprotecting the dog neck and making your dog wear it comfortably. Designed with the high quality durable nylon,it is very durable and nice. The length of the collar is adjustable and it makes your dog breath freely. Size: Black: L: Approx.4x 66cm (1.57"X 25.98") XL: Approx.5x 73cm ( 1.96"x 28.74") Neck Circumference: L: Approx.43-55cm (16.93"- 21.65") XL: Approx. 47-61cm (18.50" - 24.02") Green: L: Approx.4x 67cm (1.57"x 26.38") XL: Approx.5x 76cm (1.96"x 29.92") Neck Circumference: L: Approx.44-56cm (17.32"- 22.05") XL: Approx. 53-65cm (20.87" - 25.59") Blue:L: Approx.4x 65cm (1.57"x 25.60") XL: Approx.5x 74cm (1.96"x 29.13") Neck Circumference: L: Approx.42-55cm (16.54"- 21.65") XL: Approx. 50-63cm