Like all technology improvements, the power and size requirements for cloaking technology seem to be getting smaller and more efficient.
In 2370, Quark illegally acquired a small cloaking device and installed it in the central engine core of a Cardassian shuttle. Also from DS9, the self-replicating mine invented by Miles O'Brien, Rom, and Jadzia Dax in 2373 were even smaller. Each mine was cloaked and extremely small, no more than a meter across. Can or has the cloaking technology been reduced in size even further than that? Say to a size suitable for an individual cloak?