The image shows a close-up of a square-shaped piece of concrete or stone with a rough texture. The concrete appears to be old and weathered, with visible cracks and crevices. The edges of the concrete are rough and uneven, with some areas appearing to be jagged and chipped. On the left side of the image, there is a hand holding a ruler with a red, white, and black color scheme. The ruler is resting on the edge of the square, and the background is blurred, making it difficult to make out any other details.