The rectangle groove in the paw-shaped and an ellipse groove in the heart-shaped designs is designed to hold a photo of your cherished pet, approximately 2.75 inches by 1.77 inches (7cm x 4.5cm) and 2.56 inches by 1.97 inches (6.5cm x 5cm) respectively. Its a heartfelt way to remember and honor the special bond you shared with your pet, and to keep their memory close to your heart.