Anyone know what these are? I don't have the dimensions, but looks to be 3-4 inches long based on the place mats. They were found at the base of a utility pole. Guesses so far include knife rest, butter mold, or possibly an electrical cover of some sort. I couldn't find the glass mark on line, but it might provide an important clue...

It appears that these are pot feet. They come in sets of three or four, and are placed under ceramic planters to elevate them off the ground.