Wild One Collars are great for pups of all ages and sizes. We do recommend you size up as puppies can outgrow their walk gear as they get older and grow into their adult body.
The collar should be snug against your dog's neck, but with enough room to place two fingers between the neck and the collar. This ensures they're safely inside while giving them room for movement and comfort.
Wild One Collar is finished with a PVC coating making it water resistant and safe from the elements. The hardware and buckle are made from a rust-resistant Zinc Alloy, which is more rust-resistant than your average stainless steel, so you can use it for a long long time. That said, like many metals, it may rust eventually after prolonged exposure to the elements.