Let B(kappa,lambda) be the subalgebra of P(\kappa) generated by [kappa]^{<= lambda}. It is shown that if B is any homomorphic image of B(kappa,lambda) then either |B|<2^lambda or |B|=|B|^lambda, moreover if X is the Stone space of B then either |X|<= 2^{2^lambda} or |X|=|B|=|B|^\lambda.
This implies the existence of 0-dimensional compact T_2 spaces whose cardinality and weight spectra omit lots of singular cardinals of ``small'' cofinality.