Handmade Keepsake Size Pets Urns. This is our smallest size pet urn that we carry. The keepsake size urns range from 10 to 14 cubic inches. This size is most often used for a cats ashes or a small breed of dog. The perfect size urn for pet parent's wishing to keep just a very small portion of the ash of their pet. Celebrate and honor the memory of your pet angel with one of our beautiful and elegant artisan pet urns.