First, you'll want to consider the size of dog collar that your dog needs. While you're likely to want to choose a collar that you can expand and make smaller when you need to, you'll want it to be the right size for his breed. You'll want to measure around your dog's neck to see how large of a collar he needs. Keep in mind that you don't want it so tight that it's uncomfortable nor so loose that he can easily shake it off. A good rule of thumb is that you should be able to fit two fingers under his collar.
Width is the next decision to make. Smaller dogs will typically use a dog collar that is slimmer while bigger dogs will use a thicker, wider collar. This demands partially on the type of leash you're using and partially on how strong your dog is. If you're not sure how wide their collar should be, take a look at the options and see which one seems like it would work best for your dog or dog breed type.
There are several types of materials that a dog collar can be made of. Nylon is one of the most popular choices, for a few reasons. First, it's easy to clean and will not be damaged by rain or snow. Second, it's incredibly durable and strong. You won't have to worry about a nylon collar fraying the way you might with other types of collars and leashes. Nor will you have to worry about it gradually breaking down or being chewed through, as is sometimes the case with a leather collar.
Once you have a general idea of the size and type of dog collar you're looking for, you'll get to choose the collar. Many owners choose a variety pack from a site like www.mfrexpress.com. This allows them to change their dogs collar when they'd like. Some people prefer to buy a matching collar and leash while others like them to contrast. You might choose a solid color or a print. No matter what you choose, be sure that it's something you'll like.
Buying a dog collar isn't difficult but it does take a few moments to consider what would work best for your dog. If you buy a lightweight option like a nylon collar, your dog won't even know it's there, yet you'll be able to add his tags to ensure that if he's lost, he gets returned to you as quickly as possible.