●★Convenient Sizes to Choose-Our sizing may differ from other brands, it suitable for puppies, small, medium and large breeds.Available in 3 sizes, S(1.0"x12"-16"); M(1.0"x16"-20"); L(1.0"x18"-24"). Please make sure leave 2 fingers between neck and collar.It designed for training purposes, this collar slips over the head and tightens when pulled. ●★Reflective Safety Stitching?Great for outdoor & night use! This durable Nylon dog collar is weather-resistant and features reflective stitching along the polyester webbing that makes it easier to be seen when you’re walking around at night, making it more secured. ●★Pretty Martingale Collars- NO BUCKLE nylon dog training collar is soft and comes in great designs with bright colors. Choose from 5 colors: pink,red, teal,blue & Purple.The martingale collars have a secure fit to help prevent dogs from escaping or barking out of the collar. ●★Durable & Comforty -Silky soft nylon webbing means your dog will stay comfy. Adjustable so you can have the perfect fit. ●★Satifaction guarantee:The classic comfort collar is made from material that was specifically chosen for its toughness and durability.it provides better flexibility for running, walking, jogging, training, and active play.