The pillow looks as if you took a flat marker and stretched it vertically. It is usually about 8 inches high in back, 6 inches high in front and 12 inches deep (front to back). These monuments still stick out of the ground for increased visibility and the slightly slanted top makes them easier to read than a flat stone.

Of course, various options can be added such as black and white or color photographs, flower vases, concrete borders and so forth.