  We study numerically the length distributions of the infrared monopole
clusters in pure SU(2) QCD. These distributions are Gaussian for all studied
blocking steps of monopoles, lattice volumes and lattice coupling constant. We
also investigate the monopole action for the infrared monopole clusters. The
knowledge of both the length distribution and the monopole action allows us to
determine the effective entropy of the monopole currents. The entropy is a
descending function of blocking scale, indicating that the effective degrees of
freedom of the extended monopoles are getting smaller as the blocking scale
increases.
