The smallest asteroid or celestial body outside Earth for which we have high-resolution surface photos is Dimorphos, the moonlet of the asteroid Didymos. Dimorphos is about 160 meters (525 feet) in diameter, and NASA's DART mission provided detailed, close-up images of its surface before impact in 2022.

The scientists at Johns Hopkins University Applied Physics Laboratory made a full 3D model of the asteroid from the photos taken from the DART mission. Since the photos are all from one side, the other side of the 3D model is just a sphere. The article about is: https://iopscience.iop.org/article/10.3847/PSJ/ad0b07/pdf

I got the base model from Small Body Mapping Tool. Then I added a wall hook and made it empty inside. The scale is 1:1000. Printed with some supports from Matt Grey PLA.

The first image is from my print. The next one is the original image from Wikipedia, used to make the 3D model.