Yes, once you receive a collar from Hotdogcollars.com, you can typically adjust it to ensure a proper fit for your pet. Most collars are designed with adjustable features that allow you to customize the size according to your pet's neck measurement. Often, you will find a buckle or slide mechanism that makes it easy to increase or decrease the length of the collar. It is important to adjust the collar so that it fits snugly but comfortably, allowing you to slide two fingers between the collar and your pet's neck. This will help prevent discomfort or chafing. For specific instructions on adjusting a collar, you may refer to the product details available on the Hotdogcollars.com website, as each style may have its unique adjustment method. Enjoy finding the perfect fit for your furry friend!