The Pet Supply is an online retailer focused on expressive, coordinated products for pets and their people. Its range includes dog and cat essentials, including harnesses, collars, leashes, waste bag holders, and other walking accessories. Shoppers can also find pet apparel such as sweaters, jackets, bandanas, hats, scarves, and leg warmers, alongside toys, blankets, lick mats, picnic mats, treat pouches, and gift cards. Bundle options make it easy to pair items, while matching designs let owners coordinate with their pets.

The brand organizes its products into original collections featuring seasonal themes, colors, and playful designs, as well as collaborations with well-known entertainment, character, sports, and lifestyle properties. These include collections connected to Disney, Harry Potter, Peanuts, Sanrio, Marvel, and MLB teams. The store also offers apparel and accessories for people, including hats, T-shirts, sweatshirts, and bags.

The Pet Supply provides shopping resources such as sizing charts, a harness fit guide, how-to videos, and shipping and returns information.