This can not be called plug!
It slides out as soon as it's been put in and let go of.
This is far too small to accomplish much of anything. The tip is too similar in size to the neck, so it doesn’t stay in, the bits that should stimulate your perineum don’t actually touch it (the base is too small).
This being said, it’s very firm, and a high quality toy. So if you’re looking for a small plug that cannot be used for extended wear, this could be it!