Our polyurethane coated 3/4 inch wide nylon dog collars are soil and odor resistant, water repellent and highly visibility . This bright color collar also resists rotting and is easily cleaned and be cut off and have holes added without burning or melting like conventional nylon. This dog collar is ideal for identifying your dog in the field during the day. Ring-in-Center style rolls over to prevent dog from becoming entangled on fences or the brush. The colors available are Blue, Green, Orange, Pink, Red, Yellow & Purple. PLEASE MEASURE YOUR DOG'S NECK. Size 16 will fit a 9-1/2 inch to 12 inch neck. Size 18 will fit a 10-1/2 inch to 14 inch neck. Size 20 will fit a 12-1/2 inch to 16 inch neck. You can add another hole to this collar if it is a little too long, but you can not add more collar if the collar is too short.