Buckle collars, also called flat collars, are usually made of nylon webbing or leather (less common materials can include polyester, hemp, or metal) with a buckle similar to a belt buckle, or a quick-release buckle, either of which holds the collar loosely around the dog's neck. Identification is commonly attached to such a collar; it also comes with a loop to which a leash can be fastened.
Nylon quick-release buckle collar with identification and medical tags.
Flea collars are impregnated with chemicals that repel fleas. They are usually a supplementary collar, worn in addition to the conventional buckle collar.
Elizabethan collars, shaped like a truncated cone, can be fitted on a dog to prevent it from scratching a wound on its head or neck or licking a wound or infection on its body.
Break-away collars look similar to buckle collars, but have a safety mechanism installed that allows the dog to break free of the collar if excessive force is applied. These collars are useful in situations where a non-quick release collar could get snagged and strangle the dog.
Safety Stretch Collars an elastic panel in the sturdy nylon collar allows escape from potential strangulation dangers such as branches, fences, gates and other dogs. Unlike breakaways a stretch collar acts like a traditional static collar when clipped with a leash.
Stud collars are leather collars fitted with dulled points and/or metal studs that traditionally prevented another animal from biting the dog's neck. In modern societies, stud collars are more commonly considered a fashion accessory.