Instead of buying several collars for your puppies first year, we suggest the British Style Slip Lead & Collar which is all in one, that simply slips over the head of your pup, then you have an adjustable tab to slide so that that collar can't slip over the puppies head. This lead can be used for the life of the dog and we have many that are over 15 years old. Easy to wash, comfortable in your hand and make sure you order the 6 ft. length. Please remember that place the lead on over the pups head in the shape of a " P " ......not a " Q" as you do not want to choke the puppy. So facing the dog, take the lead and make a P, with the loop on the left side as you place the lead over the head. The adjustable tab will be on the bottom right to slide as you are standing in front of the dog.