The image is a close-up of a textured surface. The surface appears to be made of a light-colored material, possibly sand or gravel. The texture is rough and uneven, with deep grooves and crevices running through it. In the center of the image, there is a black and white striped ruler with the number 8 cm written on it. The ruler is positioned at an angle, with the ruler pointing towards the right side of the frame. The image is taken from a top-down perspective, looking down on the surface.