>>6288742There will definitely be things smaller then what I am suggesting, but you are asking Plamo/gunpla general and not scale model general so this will probably be among the smallest we know about.
first is the upcoming Hexagears like
>>6288678 These things are 1/24 scale, so very small, much smaller then GI Joes.
Second is my personal favorite for the moment, Universal Unit. Tiny gundam kits basically, mode kit versions of the now retired Assault Kingdom line. These little guys have shockingly high amount of posability, although a few of them have lesser articulation then their AK predessecor despite being virtually identical. Biggest example would be zaku thanks to stiff unbendable plastic for the leg tubes and skirt armor lacking movable panels.
Third is the 1/144 scale Zoids, these are probably the most part heavy of the tiny kits I mentioned, so if you want more of the model kit experience, these are for you. They are in the same scale as HG gunpla but only come up to the thighs at their highest. Most will be more like knee height.
But again, this is the gunpla thread so if you are looking for boats that fit in bottles or something, ask Scale Model General. But I still recommend any of the three i mentioned as they make for fun little desk toys to tinker with now and then
