  In accordance with current models of the accelerating Universe as a spacetime
with a positive cosmological constant, new results about a cosmological upper
bound for the area of stable marginally outer trapped surfaces are found taking
into account angular momentum, gravitational waves and matter. Compared to
previous results which take into account only some of the aforementioned
variables, the bound is found to be tighter, giving a concrete limit to the
size of black holes especially relevant in the early Universe.
