There are enough types of dog collars and leashes available that you should be able to find one that perfectly suits you and your pet.
Understand that any type of collar and leash will do, as long as they are strong enough to hold your dog, fit properly and are not too heavy for your dog to carry.
There should be two fingers distance between collar and the dog. Its
good idea to measure like this
Get an idea as to what type or style of collar you are looking for. Do you want something personalized, glittery, for a holiday, in a certain color or fabric, or with a specific design?
Consider the type of breed your dog is and what color her fur is. A fuzzy pink collar that would work for a toy poodle would probably look silly on a Doberman.
Shop around to see all the types of collars and leashes available.
Look at the price ranges, and decide how much you would like to pay. Leashes and collars are priced starting at $10, depending on how fancy you want yours to be.
Be certain you purchase a leash that is the right length for your dog. A very long leash will get tangled in a small dog's legs. A short leash will impede a big dog.
Ask the salesperson how durable the collar and leash will be. Decorative or glued-on items may have a tendency to fall off.
Check out some online stores to get a good idea of the wide variety that is available.
Look in Recommended Merchants for stores available online.
If you buy his/her first leash, you should do it at an early stage of its life (2-3 months). Let the dog wear it first inside the apartment/yard so it may get used to the idea of having something attached on his neck.
Also, if you can't afford to change leashes every time your dog grows, here are some additional tips: