You should post the size of your finds. It could be 3 feet or three inches to someone looking at that pic.
Its best to place a rule or calipers in the pic or at least state the size in your post.
I see you are new, welcome to treasurenet .
I see posts from people who have been here years not posting size so its nothing new.
I dont know what your find is but seems to small for fence part.
The shape reminds me of some perfume bottle stoppers Ive seen missing the cork but thats just a guess.