Schnauzer Memorial Stone. Schnauzer Gravestone. Pet Headstone Memorials 6 x 6 Inch. Schnauzer Pet Memorials Custom Dog Pet Marker 6 X 6 X 1/2 (approx size) Tumbled Slate Stone. I will customize a pet memorial on this slate stone with the name of your pet, a graphic of your dog breed and 2 brief lines of text no longer than 10 characters including spaces.