"Evoking feelings of warmth and playfulness, each stamp shows a cute and cuddly animal resting its front paws on a big red heart. Sure to add a bit of whimsy to your valentines, these adorable stamps are also suitable for use on letters and cards throughout the year," a press release from the USPS states.

Animal lovers can pick between either a puppy or a kitten leaning against a big red heart to send mail to their loved ones.